Texas executed a Mexican Mafia hitman on Wednesday evening with the state’s second-to-last dose of the lethal injection drug pentobarbital. Manuel Vasquez, 46, was pronounced dead at 6:32 p.m. local time. Vasquez, convicted of killing 51-year-old Juanita Ybarra in San Antonio in 1998, is the fourth person Texas has executed this year, and now the state has only enough pentobarbital for one more execution. Texas has scheduled at least six more inmates to be executed in the next few weeks. It is one of multiple states having difficulties securing lethal injection drugs to continue executions. Utah legalized firing squads for state executions on Tuesday.