Dallas Police Chief's Son David Brown Jr. Reportedly High Before Cop Killing

Nov. 7, 2010 — -- The son of the Dallas police chief suffered bipolar disorder and was abusing drugs before the June shootout that left a Lancaster, Texas, police officer dead, according to a sheriff's department report on the incident.

ABC affiliate WFAA in Dallas has obtained the sheriff's department's final investigation into the incident in June of this year when David Brown Jr., the son of Dallas Police Chief David Brown, shot Lancaster Police Officer Craig Shaw in a Lancaster apartment complex.

"He told [his girlfriend] that his father Dallas Police Chief David Brown, Sr. was against him and believed his grandmother along with everybody else hated him," the report read.

According to WFAA, investigators said Brown's girlfriend "told us that he had been smoking 'WET' [marijuana or tobacco soaked in embalming fluid] the day before. ... He told her he was hearing voices in his head. His behavior was psychotic, paranoid."

Brown had a brief stay at a psychiatric hospital in 2006, when he was diagnosed with bipolar disorder, the report said. He admitted smoking marijuana daily and said he thought God was talking to him.

According to the report, Brown had stopped taking his medication some time before the fatal shootout.

The incident occurred on June 20, when police were called to an apartment complex to investigate the shooting of a man on the sidewalk, now identified as Jeremy McMillan, 23.

When police arrived on the scene, they found Brown trying to get away. Shaw fired more than two-dozen rounds from his AR-15 rifle, but Brown returned fire and hit Shaw in the head, killing him instantly, police said.

Brown was also hit numerous times in the back of the head, shoulders and thigh, and died from his wounds. According to the autopsy, Brown had marijuana and PCP in his system.