Looks like you will need to tell the officials in jail that he really needs his medication, so that he wont go in to the deep end. You need to get that done first. My wife is a bipolar and she has been in the manic stage a while and went on the spending spree and thinks that she could heal people, with her special gifts and etc...She is finally getting the help that she needs, but had to be done by commiting her. I know how you feel and I have been there and now stock with a bunch of bills. The only thing that I know to tell you is that do what it takes for your dad to get regular on his meds..That's the only thing that would help him now and dont let up...He will thank you one day. After all, he will always be your dad and he will always love you. Another thing is that, once he gets out of jail, try and take him back to his doctor and get him re-evaluated. Sounds like he may have other issues and may need to be put on diffrent meds.
Good luck to you and will be thinking about you and please pray for my wife also.