Well Werewolfs even in myth are very rare.I had a feeling that was going to be your argument. It's not that it's impossible; it's that the humans underestimate the werewolves' abilities.
What if it was a modern-day werewolf? What if they were in a thick, concrete jail cell with no bars or windows?
So yes, there really is no expert on how to handle one.
Concrete, no bars, no windows?
Well just like anything living, it would suffocate and die.