Stuck with a bad roomate, wondering what other have done?

[bertrenolds5]

I have a roomate that has finally gotten on my last nerve and I am wondering how others have delt with it. This kid, he is 19 and gives decent teens I know a bad rep. He doesn't clean up after himself and has random people over to destroy our house and yell and scream and drink until 230am when other roomates have gotta work early.
This kid never signed the lease so does he basically have almost no rights other then he has been paying rent so at the end of march we could kick him out? He paid first/last months rent and I honestly don't wan't to kick him out but could I make friends he has over leave? I am honestly considering calling the cops and saying kids are drinking underage that's how much I hate this kid now but I am not sure if I wanna be that much of a dick. I am wondering what other members have done because I know people on this forum have probably had plenty of bad roomates.