Please enable Javascript to watch this video 
 
 DES MOINES, Iowa -- Des Moines Police are investigating a deadly assault. 
 
 32-year-old Ryan Thompson died at the hospital Monday less than 24 hours after his fiancée says he was punched in the head. 
 
 Officers were called to her home in 7300 block of SW 17th Street after 3P p.m. Sunday on an assault. 
 
 Lindsey Engquist says at first, Thompson appeared fine. Then a few minutes later, he looked like he was having a stroke and medics rushed him to the hospital. According to Thompson’s family, the blow to his head ruptured a blood clot on his brain that no one knew was there and doctors couldn’t stop it. 
 
 “The bleeding had become too much and he had to be put on a ventilator and he was pretty much kept alive by machines and his mother made the best decision and decided that he should just go and be at peace,” said his 31-year-old fiancée. 
 
 While the father of two is now at peace, those who loved him most are at a loss. 
 
 “There's not enough I can say about him. He was wonderful. He was just a wonderful guy,” said Engquist. 
 
 Police have a suspect in the case but are not releasing his name or what criminal charges could be filed in Thompson’s death. 
 
 “We know that he was assaulted. Some of those details of how that happened are still a little sketchy. We think we've identified what the motivation may have been,” said Des Moines Police Sgt. Paul Parizek. 
 
 Engquist called what happened a “freak accident.” Accident or not, she said the person who hit Thompson caused his death. 
 
 “If you assault someone and they die, there is some culpability on your part and it's probably going to be criminal,” said Parizek. ||||| A 32-year-old Iowa man died one day after getting punched in the face while talking to his fiancée outside their home. 
 
 The suspect drove up to Ryan Thompson and Lindsey Engquist on Monday, got out of the vehicle and then punched Thompson on the side of his face after saying he owed him money. 
 
 "It was a sucker punch," Engquist told WHO. 
 
 Thompson was able to make it inside the home following the attack, but was slurring his words, according to the Des Moines Register. 
 
 NYPD traffic agent punched by man caught urinating on tow truck 
 
 Ryan Thompson with his fiancée Lindsey Engquist. (via Facebook) 
 
 It turned out that the blow to the head ruptured a blood clot that no one knew existed, according to WHO. 
 
 "The bleeding had become too much and he had to be put on a ventilator and he was pretty much kept alive by machines and his mother made the best decision and decided that he should just go and be at peace," Engquist told the station. 
 
 Thompson passed away on Tuesday at a nearby hospital. 
 
 Fishing was one of Ryan Thompson's big passions. (via Facebook) 
 
 Cops have identified the suspect in the brutal attack, but an arrest has not been made. The suspect was in his 40s with black hair, a 10-year-old witness told cops, according to the Register. 
 
 Iowa teacher accused of sexual relationship with former student 
 
 Engquist told Des Moines police she didn't know the man. 
 
 "We know that he was assaulted," Sgt. Paul Parizek told WHO. "Some of those details of how that happened are still a little sketchy. We think we've identified what the motivation may have been." 
 
 Ryan Thompson with his ex-wife Stephanie Waddell and their two children. (Stephanie Waddell/via GoFundMe) 
 
 A funeral will be held on Saturday for Thompson, who leaves behind a son and a daughter. 
 
 "He was in love with his children," ex-wife Ashley Waddell told the Register. "They hold him on a pedestal that no one can touch." 
 
 Thompson loved fishing and was a Chicago Cubs and Bears fan, according to his obituary. 
 
 "He was the life of every party," Waddell told the Register. "He was so funny and had a huge heart. He truly made every one light up the moment he stepped in the room." 
 
 With News Wire Services ||||| From left to right: Ashley Waddell, Ryan Thompson, and their children Gaven and Bridgit. (Photo: Submitted photo/Special to the Register) 
 
 A Des Moines father died after a single punch to the face during a bizarre encounter with a stranger Monday afternoon. 
 
 Ryan Thompson, 32, was talking with his fiancee outside their home in the 7300 block of Southwest 17th Street around 3 p.m. when a man driving a dark-colored Sedan stopped and approached them, according to police records. 
 
 "You owe me money," he said, and punched Thompson once on the side of the face, the report states. He then walked back to his car and drove away. 
 
 Thompson was dazed, but he made his way inside the home to wait for medics. Officers reported that he was speaking unintelligibly and slurring his words. The fiancee told police that Thompson was not intoxicated. 
 
 He died a day later at Iowa Methodist Medical Center. 
 
 A 10-year-old witness described the suspect to police as a white man in his 40s, with long, slicked-back black hair and a clean-shaven face. 
 
 The fiancee told police she did not know the man and said the assault was unprovoked. 
 
 Detectives have identified a suspect but no charges were filed as of Wednesday afternoon. 
 
 Polk County Medical Examiner Gregory Schmunk said Wednesday that an autopsy was conducted, but he will not determine a cause of death until all test results are available. That could take eight to 10 weeks, he said. 
 
 Thompson's ex-wife, Ashley Waddell, 32, described him as an amazing father. 
 
 "He was in love with his children," she said. "They hold him on a pedestal that no one can touch." 
 
 Waddell and Thompson began dating while students at Southeast Polk High School. They had two children together; a son, Gaven, was born in 2002, and daughter Bridgit arrived three years later. They divorced in August 2015. 
 
 "He was the life of every party. He was so funny and had a huge heart. He truly made every one light up the moment he stepped in the room," Waddell said. 
 
 The family will hold funeral services for Thompson on Saturday morning. 
 
 Read or Share this story: http://dmreg.co/29CQCLy
– A 32-year-old father of two is dead after a "sucker punch" to the head ruptured a blood clot on his brain that no one was aware of, his family tells WHO. Fiancée Lindsey Engquist calls it a "freak accident." According to the New York Daily News, Engquist and Scott Thompson were outside their home in Des Moines, Iowa, on Monday afternoon when a man drove up in a sedan. He got out of his car, said something about Thompson owing him money, and punched Thompson in the face. Engquist tells the Des Moines Register she had no idea who the man was. Thompson seemed OK at first, but started showing signs of a stroke a few minutes later. He was taken to the hospital, where doctors were unable to stop the bleeding from the blood clot. Thompson died Tuesday. “There's not enough I can say about him," Engquist tells WHO. "He was wonderful. He was just a wonderful guy.” Thompson's ex-wife agreed, telling the Register: "He was in love with his children. They hold him on a pedestal that no one can touch." Police have a suspect—a 10-year-old witness saw a white man in his 40s with long dark hair—and possible motive in the attack but aren't releasing that information at this time. It could take up to 10 weeks for the Polk County Medical Examiner to produce an official cause of death. (A passenger says a 10-hour flight caused blood clots that nearly killed him.)