UFC fighter Irwin Rivera has been arrested for 2 counts of 1st degree premeditated murder ... and could face the death penalty, if convicted.
31-year-old Rivera is a UFC bantamweight (135 lbs.) fighter who first fought with the promotion in May 2020. Rivera is 1-2 in the UFC ... and 10-6 as a professional.
Rivera was booked into the Main Detention Center in West Palm Beach, FL around noon on Thursday, according to jail records.
The charges ... 2 counts of premeditated 1st degree murder. A conviction could carry life in prison -- or the death penalty.