Something struck me in your log.. and that is the number of times you say "sister's."
Yes, he clearly targets his 9 yo sister and his father. Sometimes me, but not as much. I make it unpleasant, I absolutely insist there be a consequence. The other three boys are big and good natured but can be scathingly scornful. difficult child stole tootsie pops from the oldest once. Oldest then replaced them (oldest and his girlfriend just love tootsie pops) and left them lying around. They disappeared again, and oldest announced to the entire family. "Whoever stole my candy, well, the joke is on you. I unwrapped them both and twirled them around in my armpits after working out (son is a gymnast and gets very sweaty and stinky), then rewrapped them."
Next time he had tootsie pops they were left alone.
Dad also doesn't punish much. Sometimes over his stuff he goes ballistic, but it's over in two days and he's back to "I want to trust you, I'm giving you another chance" (this speech always, ALWAYS makes me anxious because it's stupid...difficult child is NOT trustworthy and it doesn't take long before difficult child does something else). EVERY weekend this happens, and we've had incidents for 4 years now. Over 200 broken incidences of trust, and yet my husband still hasn't caught on. Now that difficult child is on lexapro, husband is hoping that will make difficult child trustworthy. So he keeps giving him 'another chance'.
difficult child is only held accountable for about one fifth of what he does, and then usually only for something that has to do with his dad's stuff. When his sister's stuff disappears or is ruined, husband has a tendency to say, well, it was old, she doesn't play with it often, she probably lost it herself (which has happened, she's little), it was broken anyway...
He also yells at her for leaving her stuff out, and now she doesn't tell him what's missing. She should be able to leave her stuff out, it's her house, and she tries hard not to, but she's little. And besides, how did difficult child get ahold of husband's cellphone to put in the disposal? husband left it out.
husband says he doens't know what to do, "I'm mad at him all the time. I've been mad at him for 4 years now". He says no punishment helps (of course, not punishing doesn't help either), so what's the point of punishing him (three therapists tho have said to have a consequence even if it doesn't work. Accept that it won't change him, but have a consequence anyway). However, I say the punishment of difficult child for doing crappy things to other people makes the VICTIMS feel better even if it doesn't improve difficult child. And note when difficult child does get punished, it's usually for messing with husband's stuff.
But I think difficult child picks his victims carefully. If MY computer ends up in the pool I won't yell at difficult child, I will call the police. difficult child knows this. The older boys might seem to him unpredictable, besides in a way I think he likes them and slightly wants their approval. His sister is helpless and he knows husband is not likely to do much about her stuff disappearing, she might even be blamed even if husband knows difficult child did it. And he's jealous of her. Also he targets husband because he's so angry at husband for remarrying, for not letting difficult child control the household, for his mom, for trying to get close (difficult child has attachment disorder), etc...
Because difficult child chooses his victims, I and many people think he CAN help it.
We have locks and alarms and watch him all the time, and still stuff happens. It's a game. That's why I almost cried when I read the "I'm so sick of all the sneaking and lying and stealing" thread. That's us!