Philadelphia police are trying to identify a suspect in last week's fatal shooting outside a peace concert at the Dell Music Center.
Guevara was shot shortly after 8:30 p.m. Wednesday in a parking lot outside the music center, located near 33rd and Huntingdon streets in Fairmount Park.
He suffered gunshot wounds to his abdomen and thigh, and was taken to Temple University Hospital, where he was pronounced dead just after 2:15 a.m. Thursday.
An anti-violence concert, called "Philly Support Philly: Peace on the Streets," was taking place at the Dell the night of the shooting.
Anyone with information about the suspect or his whereabouts is asked to call police at 215-686-3334. As in all Philadelphia homicide cases, a $20,000 reward is being offered for information that leads to an arrest and conviction.