YOU have documented your criminal record many times over, so it's not like anyone is googling you. These are YOUR comments:
90s: Arrested in Sac town for DUI
2000s: Arrested in Las Vegas, and by your admission a warrant has been issued for unpaid fines
2013/14: Something happened in Oregon
We also have no idea what you have not reported.
I honestly believe Mexico is the exact wrong place for a petty criminal like yourself to hang out in. But the larger issue is your new roommate. He might get caught up with your hijinks and you need to disclose in ADVANCE your bizarre behavior and the possibility of a Federals knock at the door.