I'll bet you a nickel it doesn't happen again, broticles. More than one person believes it was Sean because people who had stuff missing were either someone he had issue with or their neighbor.
I'm going to talk to my neighbor about hooking something up. He has a window facing our patio. Management just put out a flier that basically says don't put stuff in your FAU closet and they are not responsible for stuff getting stolen.
I've mentioned Stephanie, Sean's mom. Outwardly, a nice lady. Works with special needs kids. Laughs. Service connected disability. If I turn in evidence of Sean being bad, both he and Stephanie will be evicted. As hard as it is to find affordable housing in San Diego, I couldn't do that to her. I would probably approach her and tell her to get a restraint order against Sean or kick him out. A bitch about tenants' rights in San Diego is it takes, maybe, six months to formally get someone removed from the premises. Even though Sean is not on the lease, he gets mail at the apartment. When you get mail, you have more rights than the owner/renter.
If I can prove his initials are SDB, I know he has done tagging around the complex. Seems he does stuff when he gets pissed off.