An associate professor at Northwestern University and an Oxford University employee wanted in connection with a murder in Chicago surrendered separately to authorities in California on Friday, ending a nationwide manhunt, a U.S. Marshals official said. 
 
 Associate professor Wyndham Lathem surrendered to marshals at the Oakland federal building at around 7:30 p.m. local time (10:30 p.m. ET) and Andrew Warren surrendered at a police station in San Francisco, U.S. Marshals Supervisory Deputy Frank Conroy said. 
 
 Warrants for first-degree murder had been issued for both men Monday for their alleged involvement in the death of Trenton H. James Cornell-Duranleau, who was found stabbed to death in a luxury Chicago apartment on July 27. 
 
 "Wyndham surrendered peacefully and we didn't have any issues with him," Conroy said in a phone interview. "It was a long nationwide manhunt, a very important case, especially for the city of Chicago, and we are hopeful this arrest brings closure to the victim's family." 
 
 Wyndham Lathem, lefrt, and Andrew Warren Chicago Police Department via AP 
 
 Chicago police spokesman Anthony Guglielmi said detectives will interrogate Lathem and Warran once they are returned and police will publicly detail the cases against them after those interrogations. 
 
 "Both individuals will be held accountable for their actions," Guglielmi said in an email. Police said they will outline their case against the two suspects after the interrogations take place. 
 
 Lathem, 42, is an associate professor of microbiology and immunology at Northwestern University and has been a faculty member in the department since 2007. Warren, 56, is a senior treasury assistant at Oxford University. Lathem and Warren will appear in Alameda and San Francisco county courts and will have extradition hearings, Conroy said. 
 
 Alan K. Cubbage, vice president for media relations for Northwestern University, said Saturday that Lathem "was in the medical school so he taught medical students or graduate students sometimes but he was primarily a researcher." Cubbage said Lathem never taught undergraduate students, was not teaching at the time and he was not scheduled to teach in the fall. 
 
 Guglielmi has said that police got a call the Grand Plaza building manager who had received a cryptic tip that something had occurred in apartment 1008, and police found Cornell-Duranleau dead. 
 
 Guglielmi said Lathem and Warren were confirmed to be at the building by security cameras. Lathem lived in the apartment that was identified as the crime scene, he said. 
 
 On Friday Chicago police said Lathem had sent a video message to various friends and family members apologizing for his involvement in the killing. Police also said the two suspects made a $1,000 donation to a Wisconsin library in Cornell-Duranleau's name, police said. ||||| A Northwestern University professor, wanted for a brutal stabbing in his Near North Side apartment, has sent a video message to family and friends apologizing for “his involvement” in the slaying, police said Friday. 
 
 The disclosure is the latest twist in the slaying of 26-year-old Trenton Cornell-Duranleau, who was found repeatedly stabbed and slashed in the home of Wyndham Lathem on July 27. 
 
 On Thursday, police said either Lathem or another suspect in the case, Andrew Warren, made a $1,000 cash donation in Cornell-Duranleau's name at the Lake Geneva Public Library on the day of the slaying. The person gave no indication why the contribution was being made. 
 
 Both men, who are wanted on charges of first-degree murder, remained at large Friday, though police say they have an idea where they might have fled. Lathem, 42, is an associate professor of microbiology at Northwestern and Warren, 56, is an employee of Oxford University in England, who traveled to the United States for the first time just three days before the slaying. 
 
 “We believe they're together or (at) least in very close communication,” said Anthony Guglielmi, chief spokesman for the Chicago police. 
 
 Guglielmi would not say when the video was made or when it was sent out. In it, Lathem said he had made “the biggest mistake of his life,” Guglielmi said, declining to release further information. He urged Lathem to turn himself in. 
 
 “At this point, he’s reached out to family and friends,” Guglielmi said. “We don’t want to see this get any worse.” 
 
 Police believe Cornell-Duranleau was killed in Lathem's apartment in the 500 block of North State Street around 5 a.m. on July 27. But officers were not alerted until an anonymous caller reached the front desk of the building around 8:30 p.m., more than 15 hours later. 
 
 They found Cornell-Duranleau lying face down, dead from stab wounds to his back, law enforcement sources said. In the kitchen, police found a knife with a broken blade in the trash can and another knife near the sink. Blood was everywhere, the sources said. 
 
 Police said they suspect Lathem fled with Warren. Both men were seen on surveillance video at the building, police said. 
 
 Around 5 p.m. that day — more than three hours before the body was discovered — one of the suspects walked into the library in Lake Geneva, Wis., and approached the circulation desk, according to Lake Geneva Police Lt. Edward Gritzner. 
 
 The man told a staffer he wanted to make a donation in the name of Cornell-Duranleau but asked to remain anonymous. The staffer accepted $1,000 in cash from the man, who turned and left through the main door. 
 
 Family photo Trenton Cornell-Duranleau, 26, was found stabbed to death in the 500 block of North State Street on July 27, 2017. Trenton Cornell-Duranleau, 26, was found stabbed to death in the 500 block of North State Street on July 27, 2017. (Family photo) (Family photo) 
 
 No one saw him get into a car. 
 
 The man did not specify what he wanted the money to be used for, and Gritzner described it as a “general’’ donation, nothing unusual for the library. 
 
 “They do take donations, a lot, as a matter of fact,” he said. “Accepting a donation is not uncommon.” 
 
 Four days later, Chicago police detectives arrived at the library and began asking questions. They showed the staffer a photograph of the suspects and the staffer picked the man out. 
 
 The library does not have video surveillance, Gritzner said. He did not know if the man was Lathem or Warren. 
 
 Gritzner said Friday there is no indication the suspects are still in that area, but police have been searching just in case. 
 
 “We’re a resort town, a vacation town. Ninety-five percent of visitors are people from Chicago,” Gritzner said. “We’ve checked the local motels, hotels and bed and breakfasts. We’ve been scanning for them every shift. 
 
 “It’s an odd one,” he said. 
 
 Authorities have so far offered little information about what may have led to the attack. Lathem and Cornell-Duranleau were involved in some sort of relationship and had “some type of falling out,” Guglielmi said. He could not elaborate on the relationship and could not say how Warren knew Lathem and Cornell-Duranleau. 
 
 Cornell-Duranleau, who had been living in the Heart of Chicago neighborhood, grew up in the small town of Lennon in eastern Michigan. He attended high school in Grand Rapids and earned a state certification in cosmetology in 2011. He moved to Chicago last year, telling friends he got a job at a salon in the city. ||||| Chicago (CNN) A Northwestern professor and an Oxford University employee were arrested Friday after a national manhunt following the stabbing death of a Chicago cosmetologist. 
 
 Wyndham Lathem turned himself in Friday evening in Oakland, California, after authorities made contact with him, while Andrew Warren surrendered to police in San Francisco, according to the US Marshals. 
 
 The suspects in the death of Trenton Cornell-Duranleau are now awaiting extradition to Illinois. 
 
 Cornell-Duranleau, 26, was found dead from multiple stab wounds in Lathem's Chicago apartment on July 27. 
 
 Lathem, 42, is an associate professor of microbiology and immunology at Northwestern and Warren, 56, works for Oxford University in England. 
 
 Prior to the arrests, Lathem had sent a video to his friends and family in which he talks about the biggest mistake of his life, a high-level source at the Chicago Police Department told CNN on Friday. 
 
 CNN has not seen the video and police are not releasing it, but Chicago Police spokesman Anthony Guglielmi characterized it as Professor Wyndham Lathem "apologizing for his involvement in the murder of Trenton Cornell-(Duranleau)." 
 
 His death occurred the same day that one of the suspects walked into the public library of Lake Geneva, a Wisconsin resort city about an hour's drive from Chicago, and made a $1,000 cash donation in Cornell-Duranleau's name. 
 
 Victim was 'mutilated,' source says 
 
 On Wednesday, Chicago police issued first-degree murder arrest warrants for Lathem and Warren. 
 
 Chicago police were tight-lipped about many details. They said they could not elaborate on any possible relationship between the victim and the two suspects. 
 
 A high-ranking police official on Thursday told CNN that responding officers found a horrific scene in Lathem's River North apartment. 
 
 "The victim was savagely murdered," the official said. Frankly, he was "mutilated." 
 
 Police recovered what they believed to be a murder weapon -- a broken blade. 
 
 The Cook County medical examiner's office said the autopsy is not complete. 
 
 According to CNN affiliate WLS , investigators determined that Warren had recently come to Chicago from England but didn't know whether he knew the victim. 
 
 Wanted for Murder by CPD - Our search will only intensify. Prof Latham & Mr Warren, do the right thing & turn yourself in to any police dept pic.twitter.com/fwWkcfFfco — Anthony Guglielmi (@AJGuglielmi) August 2, 2017 
 
 Police had said they believed the two suspects have fled the state. 
 
 "We do have an idea of their whereabouts and efforts to locate them are only intensifying from here on in," police said in an email to CNN. "Our primary focus is to facilitate a safe surrender." 
 
 Federal agencies, including US marshals, assisted in the search. Lathem's passport and Warren's travel visa were restricted. 
 
 'This place is very safe' 
 
 The apartment is in an upscale high-rise called the Grand Plaza Apartments. 
 
 "There's shock, there's no doubt about it. You know, this place is very safe," Grand Plaza resident Richard Aili told WLS . "I've been here 14 years and I've never heard of problems such as that." 
 
 Northwestern said in a statement that Lathem "has been placed on administrative leave and banned from entering the Northwestern University campuses." 
 
 "This is now a criminal matter under investigation by the appropriate authorities, and Northwestern University is cooperating in that investigation," according to the statement. 
 
 Lathem joined the Northwestern faculty in 2007 and researched bacteria that cause disease in humans, particularly lung infections, according to his university biography page, which has since been removed. 
 
 He spoke at conferences and has appeared in videos about disease research. One posted earlier this year details how an organism contributed to pneumonic plague 
 
 Victim remembered as friendly, a 'character' 
 
 A hairstylist fondly recalled Cornell-Duranleau. 
 
 "He was a nice kid who got along with everyone. People loved him. He was friendly," Peggy Bosel told CNN. 
 
 Bosel has been a hairstylist at Timber's Salon in Trenton, Michigan, for 19 years and said Cornell-Duranleau worked there for around a year and a half. 
 
 "He loved people and was really trying to get into the hair business, but that wasn't working out too well. It's a hard business," Bosel said. 
 
 She said Cornell-Duranleau was a "character" and had a good sense of humor. 
 
 The stylist said she and colleagues had never heard of the suspects. 
 
 Cornell-Duranleau left the Michigan salon at least a couple years ago, Bosel said. "He wanted to expand himself and get more experience in the business."
– A manhunt for two university employees wanted in the murder of a Chicago hairstylist ended Friday in California. Wyndham Lathem, 42, a bubonic plague expert who has been an associate professor at Northwestern University since 2007, turned himself in "peacefully" to police in Oakland on Friday evening, NBC News reports. Andrew Warren, 56, a treasury assistant at Oxford University in Britain, surrendered to cops in San Francisco in connection with the death of Trenton Cornell-Duranleau, 26, who was found dead in Lathem's apartment on July 27. The victim died of multiple stab wounds, police said. The men are awaiting extradition to Illinois on first-degree murder charges, CNN reports. On Friday, Chicago police said Lathem sent family and friends a video message apologizing for "his involvement" in the brutal slaying, calling it "the biggest mistake" of his life, per the Chicago Tribune. Police have not released a motive or many details about the murder, but a high-ranking police source tells CNN the "victim was savagely ... mutilated" in Lathem's upscale apartment. Police recovered a broken blade believed to be the murder weapon. They said it was unclear if Warren knew the victim; the Brit was just three days into his first trip to the US when the murder occurred. An odd twist: On the day of the killing, one of the suspects walked into the public library in Lake Geneva, a Wisconsin resort town about 90 minutes northwest of Chicago, and made a $1,000 cash donation in Cornell-Duranleau's name, the Tribune reports.