The only legal advice I'll give you is to call a lawyer in your area as soon as possible.

That being said, it looks like you could be charged with the Class C felony of 'Taking a Motor Vehicle Without Permission in the Second Degree' punishable by up to 5 years in the joint and Frank may be charged with the same in the first degree. And did you say that Frank is on his second strike, like this would be the third for him?

Take a look at the law yourself:

Taking a Motor Vehicle...Second Degree

Crime Classifications in Washington

Good luck,
joe