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 / Updated By Kerry Sanders, Tracy Connor and Kalhan Rosenblatt 
 
 TAMPA, Fla. — A Florida man walking to church to feed the homeless is believed to have become the fourth victim of a serial killer shooting people at random in Tampa. 
 
 Ronald Felton, 60, was fatally shot just blocks from a memorial honoring three people who were killed within days of one another last month in the neighborhood of Seminole Heights in Tampa. 
 
 A spokesman for the Tampa Police Department, Officer Steve Hegarty, said it is not known if the shooting is connected to the three murders in October, but said it will be treated as such until authorities can rule it out. 
 
 As police scoured the area for a suspect, residents were told to lock their doors and stay in place. 
 
 "We need folks to think about everything they heard last night and everything they saw this morning," Tampa Mayor Bob Buckhorn said during a news conference Tuesday morning. "We need to catch this killer before we have to notify one more family that their loved one is dead." 
 
 Felton, a father of three adult children, was on his way to feed the homeless at New Seasons Apostolic Church when he was shot, his brother James Felton told NBC News. James Felton said when his brother wasn't at his construction job, he spent every Tuesday and Thursday morning at the church. 
 
 Ronald Felton, possible fourth victim of Tampa serial killer. Courtesy James Felton 
 
 Ronald Felton spoke to his twin brother, Reggie, on the phone Tuesday morning about half an hour before the shooting took place. 
 
 James Felton, 59, said the people Ronald worked with at the church were already there, and "they heard four shots." 
 
 At approximately 5 a.m. Tuesday, police patrolling the area received a call of shots fired and were at the scene within a minute, police said. 
 
 “The neighborhood was already highly covered with police presence, so they were there in a matter of seconds," Stan Lassiter of the Seminole Heights Neighborhood Association said. 
 
 "They locked down the neighborhood immediately, and so they hope they have created a giant box around where shooter was and believe he is somewhere in there. They are hoping they have him boxed in and are going door to door combing the houses," Lassiter said. 
 
 Ronald Felton's sister, Linda Cunningham, 63, said she had been closely following the killings on the news and broke down after learning her brother was one of the victims. 
 
 "I’ve been watching the serial killer news — watching, listening, praying — and for that to happen to my brother, to be shot four times at close range, that’s hard," Cunningham said. 
 
 Reginald Felton, whose brother was fatally shot Tuesday in Tampa, Fla. Courtesy of Reginald Felton 
 
 Related: Tampa Police Releases New Video in Hunt for Clues Related to Possible Serial Killings 
 
 Reggie Felton, 60, and Cunningham said they don't hate the person who shot their brother, but hope the person turns themselves in. 
 
 "I don’t hate him. He just didn’t have to take him like that," Reggie Felton said of the suspect. 
 
 The Tampa Police Department's interim chief, Brian Dugan, said that police believed the suspect was still in the neighborhood and that officers had knocked on approximately 1,900 doors in addition to deploying K-9 units and helicopter searches. 
 
 Dugan urged Tampa residents who own firearms to ensure they know where their guns are. 
 
 "If you own a firearm of any type, we need you to verify that it’s where it needs to be," he said. 
 
 The first killing took place on Oct. 9 when Benjamin Mitchell, 22, was shot in Seminole Heights while waiting for a bus. 
 
 Monica Hoffa, 32, was found shot dead in a vacant lot on Oct. 13. 
 
 Law enforcement agents investigate the scene of Tuesday's shooting. Octavio Jones / Tampa Bay Times via AP 
 
 While walking on Oct. 19, Anthony Naiboa, 20, was shot and killed. 
 
 Investigators have not said what evidence ties the first three shootings together, or whether they have forensics that show the same weapon was used. 
 
 “My understanding from talking to one of the detectives is that they have 750 leads called in, and that’s a mountain of information to go through one by one," Kenny Hoffa, Monica's father, said. "I’m just praying one of those leads ... pans out. 
 
 "I hope they bring him to justice today and I’ll be on my way to Tampa — just to look him in his eyes. He’s got some answering to do. We, and now it sounds like three other families, deserve answers," Hoffa said. 
 
 Maria Rodriguez, Naiboa's stepmother, said her family was speechless after learning about the latest killing. 
 
 “It fills me up with anger that someone else needs to go through this,” Rodriguez said, adding that she spends her days and nights thinking of her stepson and hoping the suspect will be caught. 
 
 "It can’t go on like this. I know it won’t bring back Anthony but at least it would be closure of one part” if the killer is caught, she said. 
 
 Related: Grieving Dad: Find Shooter Stalking Tampa Residents 
 
 Police have released video of a person of interest running during the night of the first murder. Although he is not thought to be a suspect, officials believe the man might have been within range of the murder. 
 
 "We believe he may have seen something or heard something that could assist us in this investigation," Dugan said on Oct. 26. 
 
 Authorities are offering a $41,000 reward for anyone who has information leading to an arrest. 
 
 Kerry Sanders reported from Tampa, Florida, and Tracy Connor and Kalhan Rosenblatt reported from New York City ||||| TAMPA — A 60-year-old man was shot and killed before dawn Tuesday morning in Seminole Heights, the fourth victim in a series of killings that started in the neighborhood last month, Tampa police said. 
 
 The victim was identified as Ronald Felton, 60, of Tampa, an unemployed construction worker who volunteered Tuesdays and Fridays at a food bank near the shooting scene. 
 
 Police Chief Brian Dugan said police received reports of shots fired at 4:51 a.m. near Nebraska Avenue and E McBerry Street. 
 
 Investigators believe the shooting is connected to the three previous slayings in Southeast Seminole Heights. 
 
 "It’s very unfortunate here that we’ve had another one," Dugan said during a news conference at the shooting scene. 
 
 Felton was crossing the street to meet someone when the shooter came up behind him, police said. 
 
 "This has got to stop," Mayor Bob Buckhorn said at the news conference. "We will hunt this person down until we find them." 
 
 Police described the suspect in a news release as a black male, 6-foot to 6-foot-2, with a thin build and light complexion and armed with a large black pistol. He was last seen wearing all black clothing. At the news conference, police said he was wearing a baseball cap. 
 
 RELATED: Sister warned latest shooting victim to be careful traveling Seminole Heights 
 
 Robert Clark, who was doing laundry at a laundromat near the shooting scene, told the Tampa Bay Times he heard the gunfire, turned and saw a man running east. 
 
 "I’m getting ready to put another 75 cents in the machine when I hear a ‘Boom, boom,’" Clark said. "Five of them. I see a man lying in that street and another running to that road. 
 
 "When I got to the man, he was laid out bad." 
 
 Elton Sheppard, 73, who lives near the food bank, was getting ready to go to the laundromat, too, when he heard five shots. He estimated that police arrived five to 10 minutes afterward. 
 
 Signs at the laundromat say it has video recorders. Melissa Deming, who owns property in neighborhood, said she and others there have been asked to turn over any video they have to police. 
 
 Officers found Felton’s body in the road along N Nebraska Avenue, north of E Caracas Street. 
 
 Police believe the shooter lives in the neighborhood and are asking residents to stay indoors until they clear the scene. 
 
 RELATED: Arrests spike as police blanket Seminole Heights in wake of three killings 
 
 The suspect "hasn’t gone very far, and we’re talking to as many people as we can to see what they may have seen," said police spokesman Steve Hegarty. 
 
 Police and were going door to door Tuesday morning along a perimeter stretching from Osborne Avenue north to Hillsborough Avenue, and Nebraska Avenue east to 15th Street. Just before 10 a.m., they brought in a dog to help with the search near Nebraska and McBerry Street. 
 
 They were asking people where they were at the time of the Tuesday shooting and the other shootings, stopping longer and taking mobile phone photos at some addresses. 
 
 Some people who were trying to leave the area or return were asked to wait. 
 
 Lori Skiles, 51, had to leave for work at 11:30 a.m. and was allowed out. 
 
 "I’m just not allowed back in until they are done," Skiles said. 
 
 The first killing was Oct. 9, when 22-year-old Benjamin Mitchell was shot at a bus stop. Monica Hoffa, 32, was found dead Oct. 13 in an empty lot less than half a mile away. Police heard a gunshot Oct. 19 and found the body of Anthony Naiboa, 20, a few blocks from the first killing. 
 
 Friends and relatives of Felton’s gathered near the scene of the shooting once word spread that he was the victim. 
 
 Cynthia Murray, 68, said Felton was living with her at her home near the corner of Florida Avenue and Emma Street. He had been homeless and Murray took him in "some time ago," she said. 
 
 He worked much of his life in construction in Tampa but was not working lately, volunteering Tuesdays and Fridays with a food bank at the New Season Apostolic Ministries, Murray said. The ministry is at the intersection where the body was found, Nebraska and Caracas. 
 
 Felton would show up to help with the food bank at 2:30 a.m., she said. 
 
 "They do good work there for those who need it," said neighbor Sheppard. "They’re all real good people. I’ve been on this block a long time and I’ve never seen anything like this. When the sun is down I’m inside and that’s not right." 
 
 The line of people seeking food stretches down Caracas once serving begins, neighbors said. 
 
 A native of New York, Felton had a twin brother, Reggie, Murray said. 
 
 "Anybody who knows Tampa knows the twins and they know if you ask (Ronnie) for help he would do whatever you wanted," she said. "He didn’t need to come here every week but he loved it." 
 
 Felton was looking forward to helping at the food bank Tuesday because his brother Reggie was off work and planned to join him, Murray said. 
 
 RELATED: Mural is unveiled to honor shooting victims killed in Seminole Heights 
 
 "He hadn’t seen his brother much lately -— his twin," she said. "He was so excited to spend time with his brother today." 
 
 Murray said she believes Felton may have known the killer because witnesses reported he crossed the street to speak with him. She said police told her Felton was on his mobile phone with his brother Reggie at the time of the shooting so she hopes he said a name before he died. 
 
 Cassandra Davis, 29, said the Felton twins are as well known in West Tampa as they are in the Seminole Hights area. 
 
 "The neighborhoods are one big family," Davis said. "They all know the twins. They’re good people" 
 
 Linda Daniels, who said she is a cousin of Felton’s, said, "He was the sweetest person, never any problems." 
 
 For Casimar Naiboa, father of one of the three earlier shooting victims, news of another killing in Seminole Heights "is like salt in the wound" 
 
 "It brings back dark memories," said Naiboa, 50, father of Anthony Naiboa. "I still dream about my son." 
 
 As the father of a murder victim, Naiboa said he "feels bad for this victims’ family. 
 
 "When someone loses a son it is the worst feeling," he said. "I send my condolences to them." 
 
 Police have told him they hope the killer makes a mistake, Naiboa said. 
 
 "But every time he makes a mistake, someone loses their life." 
 
 This is a developing story. Stay with tampabay.com for updates. 
 
 Staff writer Howard Altman contributed to this report. Contact Paul Guzzo at pguzzo@tampabay.com. ||||| Published on Oct 26, 2017 
 
 Tampa Police released additional footage of an individual who was seen walking on a street very close to the first homicide around the time that Benjamin Mitchell was shot on Monday, Oct. 9. The department released video of the same individual https://youtu.be/bFVgEZ1rZzU 
 
 
 
 (27 second mark) 
 
 The individual appears to flip his phone with his right hand. 
 
 
 
 (60 second mark) 
 
 It appears that the individual is looking at their phone. 
 
 
 
 (1:16 mark) 
 
 Now you see what appears to be the same individual, but it’s in color. So you can see what color pants the individual is wearing, and make out the color of the hoodie they are wearing. 
 
 
 
 Now, this video is within seconds of the shooting. 
 
 
 
 (1:28 mark – running footage) 
 
 
 
 We believe this is the same person we saw walking just moments earlier. He is running in the other direction. 
 
 Another angle. We believe this is the same person, once again. Running away from the scene of the shooting. 
 
 
 
 (1:45 mark – video ends) 
 
 
 
 
 
 • We are not saying this person is a suspect. We believe this person saw or heard something that could be a key to solving these murders. 
 
 • We believe this person has ties to the neighborhood.
– After nearly a month of quiet, an apparent serial killer appears to have struck again in Tampa, Fla. Police in the Seminole Heights neighborhood say a gunman fatally shot 60-year-old Ronald Felton as he crossed a street about 5am Tuesday, reports the Tampa Bay Times. Felton was killed in the same area as three other apparently random victims in separate incidents in October. "We've had another one," said Brian Dugan, chief of Tampa's police force. "We will hunt this person down until we find them," added Mayor Bob Buckhorn. Police previously released a video of a suspect, and this time they also have a description from a witness who saw him running from the scene, per WFLA: a black male about 6 feet tall, with a thin build and light complexion. He was dressed in all-black clothing and carrying a large pistol. "We think by their proximity and the manner it was done, they are linked," said Dugan. "We're saying it's related to the other Seminole Heights murders." Police think the killer lives in the Seminole Heights neighborhood and are asking residents not only to be cautious but to help identify him. Felton, an unemployed construction worker, is believed to have been on his way to a local church food bank, where he volunteered, reports NBC News. The previous victims—Benjamin Mitchell, 22, Monica Hoffa, 32, and Anthony Naiboa, 20—were shot on Oct. 9, 13, and 19, respectively. Felton was killed just blocks from a memorial to the first three victims. (The way the suspect flips a cellphone while walking may be a clue, say police.)