White said he paid Rivera for sex on three occasions. During their fourth meeting, he told the detectives, he snapped. "I then hit Sonia in the head with a brick," he said, according to the warrant. "I hit her in the back of the head and then kept hitting her with it. I don't know how many times I hit her. It might have been about 10 or 15 times. I then left her for dead." White said he returned to the Park Street shelter where he was then staying.