"A San Francisco couple accused of murdering the man they say pimped their teenage daughter could face the death penalty if they're found guilty.

Barry Gilton, 38, and Lupe Mercado, 37, pleaded not guilty Friday, as friends and family members packed the courtroom to support them. Because the couple allegedly planned what District Attorney George Gascon called a "vigilante murder," they are eligible for the death penalty, according to KGO-TV, ABC's San Francisco station."