ANN ARBOR, MI - The body of the University of Michigan student who was the subject of a 20-hour search was found in the backyard of an Ann Arbor home, dispatch records show. Officials have also not said whether or not Mattson’s death was related to alcohol. A row of fraternity and sorority houses is within a mile of where Mattson’s body was eventually found. Multiple residents expressed sadness about Mattson’s death, some saying they wished they saw him the night he went missing so they could have helped him. Mattson was last seen at around 1 a.m. on Friday, Jan. 23, walking by himself in the 1700 block of Hill Street in Ann Arbor without a coat, police said.