Update: Lincoln Police are searching for four people who were in or near a downtown parking garage around the time a man fell to his death.
They were seen on surveillance video but are not suspected of any crime.
Investigators want to know if anyone saw or spoke to Matthew Dutton on the night of his death, or have any information on his demeanor or who was with him at the time.
LPD said he died of blunt force trauma.
Lincoln Police say alcohol may have been a factor in the death of a man who was found in a parking garage stairwell.
Lincoln Police said 24-year-old Matthew Dutton of Blair was drinking before he died, but have not released his exact BAC.
Rescue crews were called to the Que Place Garage at 1111 Q street just after 2:30 a.m. Sunday. The initial report was a man was unconscious on the ground.
Paramedics pronounced the man dead at the scene.
10/11 News spoke to a passer-by who said as he was coming down the northwest stairwell, he saw the two people trying to help the man as they called 911.
Captain Jason Stille said the victim appears to have fallen from the stairs. Video from the garage camera system is being looked to determine exactly what happened.
Stille said the initial indication is this may just be a tragic accident, but since there are no witnesses, they are collecting evidence.
Friends describe Dutton as caring, funny and a good friend.
Eileen Harman a friend of Dutton's told 10/11, "He's such a great guy. He reached out to so many people and touched more lives than he probably even realizes."
Harman added, "He has a good heart. He just cared about everyone, always concerned for others, making sure everyone was taken care of and having a good time."