Tiny bit of context, then the question.
So, during my first year, before even the first caravan, I caught a Deep Drow werewolf in the one of three cage traps I had setup due to a swarm of monkies circling my barely walled fortress. Thinking I would drop him on a Megabeast or invasion later down the road.
Fast forward 6 years when I finally have a decent invasion entrance that also works as a firing range for my Marksdwarf's to train on any critters I catch. I of course mistakenly pit the werewolf along with a few goblins and an ashland elf thief. So, strangled elf, pincushion goblins, barely hurt werewolf who turns back into a Deep Drow and becomes "Friendly". Praying they could kill him quickly I send in 3 of my Leg fighters (in the small amount of iron armor/weap I have thrown together) to put him down before he changes again.
Two Leg Fighters thrown against the wall (thankfully not injured beyond their pride), and an archer that loses a foot because I totally forgot to lock them out, werewolf passes out and is finally dead. I start working on a place to separate the archer while he is patched up, station him at the range with a few other because of some annoying Gnolls in the meantime.
He of course transforms. But doesn't attack, isn't attacked, and is just sitting there stationed with the rest of the dwarves. Anyone have that happen before? And do I have any hope of him not trying to the next thing he sees the minute I unstation the squad?
