One of Us Is Back by Karen M. McManus

It’s been almost two years since Simon died in detention, and the aftermath has been hard to shake. First the Bayview Four had to prove they weren’t killers. Then a new generation outwitted a vengeful copycat. Now the entire Bayview Crew is back home for the summer, and everyone is trying to move on.

Only, this is Bayview, and life is never that simple.