Amid the ever-growing spread of flowers, balloons and mementos that had some sort of meaning between Gabriel Saldana and his friends and family, Sonia Allen walked up and added a lavender mum, a few more balloons and a message board with the acronym “LLG.”

“Long live Gabe,” she said moments earlier, shortly after 6:30 p.m. Oct. 2, before she and two friends, Tess and Paige, walked across Route 72 in Stafford Township to join the gathering of mourners, as vehicles came to a halt at the Nautilus…