IIRC, Philly is one of the cities blessed to have an uber-Prog DA who is refusing to do his job, and Philly is already POed with him. At the same time, many/most US states' juvenile justice systems are so starry-eyed unrealistic that consequences proportional to a brutal murder are almost impossible when the murderer are as these boys, ages 14 and 10.
These two factors could intersect to get the DA recalled, if that's possible in PA, or get him tossed when he faces an election.
Speaking of possibly being recalled, it's looking likely that Los Angeles County DA Gascon will face recall in November.