According to a general offense report of the Dallas police, Walker reported at approximately 9:10 p.m. on April 10 1963, that a bullet had been fired through a first floor window of his home at 4011 Turtle Creek Boulevard, Dallas. Detectives subsequently found that a bullet had first shattered a window, then gone through a wall and had landed on a stack of papers in an adjoining room. In their report the detectives described the bullet as steel-jacketed of unknown caliber.
Police located a 14-year-old boy in Walker's neighborhood who said that after hearing the shot, he climbed a fence and looked into an alley to the rear of Walker's home. The boy said he then saw some men speeding down the alley in a light green or light blue Ford, either a 1959 or 1960 model. He said he also saw another car, a 1958 Chevrolet, black with white down the side, in a church parking lot adjacent to Walker's house. The car door was open, and a man was bending over the back seat, as though he was placing something on the floor of the car.
On the night of the incident, police interviewed Robert Surrey, an aide to Walker. Surrey said that on Saturday, April 6, at about 9 p.m., he had seen two men sitting in a dark purple or brown 1963 Ford at the rear of Walker's house. Surrey also said the two men got out of the car and walked around the house. Surrey said he was suspicious and followed the car, noting that it carried no license plate.