Los Angeles Police detectives at the Pacific Division in Venice need the public's help to catch the killer. The family of the victim is pleading for help.
A memorial marks the spot on Louella Ave. where McGuire was gunned down. His family is overwhelmed with grief.
"He touched so many hearts and that's all he wanted to do was help others, and take care of his friends and family," said Michael McGuire Senior.
"He was a sweet kid," said Krista Redick, a friend of the victim. "He never wanted to hurt anybody. I can honestly say he never had an enemy. Not one."
Detectives say on June 13, Michael was standing on the street around 2 a.m., near the scene of an after-prom party.
Detectives say witnesses told them a dark-colored SUV with tinted windows came by. They say one of the windows came down just enough for a gun to protrude and fire. The person standing next to Michael was grazed by a bullet. A single gunshot took Michael's life. His family wants to know why.
"[Whether the victim was targeted is] not determined at this time. Not as a target per se," said LAPD Det. Claudia Castruita.
"We are not ruling [a gang-related motive] out at this point," said LAPD Det. Robyn Salazar. "There's no evidence to indicate the victim was in any way affiliated with a gang."
Detectives say on the heels of that shooting they talked to witnesses but so far they haven't gotten enough information leading to a suspect.
"I would love a description of the suspect that's a little more specific, a vehicle plate," said Salazar.
"What I'm asking for is if somebody, somebody at all knows anything, to please come forward and give the detectives information," said Michael McGuire Sr.
If you can help detectives catch the killer they want you to call them at (877) LAPD-247.