A 20-year-old Wal-Mart employee is accused of slitting an off-duty firefighter's throat while on the job at a store in Princeton, Texas on Wednesday. The firefighter, George Wesley, survived the attack and went on to deliver first aid to other victims in the store, according to witnesses. Wesley is now recovering from his injuries, in addition to another stabbing victim who has not yet been identified. Police say Wal-Mart employee Nicolas Martinez has been arrested and now faces two counts of assault with a deadly weapon. There is no word on what the motive was for the chaotic attack, which prompted a store evacuation and came on the same day Dallas police were burying two of their own who were killed in last week's sniper attack.