let me see what you've done. let me see what you did. jacob! >> why did you do that? >> he's a good kid. >> i got bored. >> so you try to lose fingers because you got bored. >> of all the offenders behind bars at pendleton juvenile, 19-year-old jacob shauntee is one of the most perplexing for staff. >> every time staff does something, you don't agree with it, this is what you do, you cut or tie or something, don't you? every time. because you just want everything to be fair, right? sorry, buddy. >> get this one right here on top. >> he's done it before, and it's shocking. his nail bed is purple. that's pretty bad. like i said, he's done it before. >> just two weeks ago, officers and medical staff had their hands full with jacob during a meltdown in a time-out cell. tonight they frantically try to deal with his self-mutilation.