Hendren and his partner were supposed to be patrolling a different part of the city but went to Hendren’s home in the 700 block of Dover Place, authorities said. Alix, who was off-duty, joined them there. Inside the home, Hendren loaded a revolver with one bullet and the two took turns firing it at each other just before 1 a.m., according to court documents. Alix was struck in the chest and died from her wounds at St. Louis University Hospital.