By Matt Goodman & Sharrie Williams, CBSDFW.COM
thomas lester harper Investigators: Arlington Wreck, Shooting Suspect Was High During Fatal Crime

(credit: Arlington Police Dept.)

ARLINGTON (CBSDFW.COM) – A toxicology report reveals that the suspect accused of killing two men last week in a baffling shooting and wreck was under the influence of marijuana at the time of the crime.

Thomas Harper, 28, is accused of causing an eight-vehicle wreck on Dec. 14, beginning with a hit-and-run accident at N. Collins St. and Washington Ave. that developed into a high-speed collision a quarter of a mile down Collins, near Brown Blvd.

Najee Nasir, 42, died when Harper’s blue Chevy Tahoe rammed the back of his silver pickup truck at a speed of more than 100 miles per hour, investigators say.

When Clarance Robinson, 18, approached Harper’s vehicle after the vicious rear-end wreck, Harper is accused of revealing a pistol and shooting the teenager. Robinson died at the scene.

Harper’s two children, a twin boy and girl, were in the backseat and were not hurt. Harper was charged with murder, intoxication manslaughter and two counts of child endangerment.

An affidavit filed in Arlington says Harper appeared “remorseful” hours after the incident and that a toxicology report found evidence of cannabinoids from marijuana in his system.

On his birthday Tuesday, Harper was taken from the Arlington City Jail to the Tarrant County Correction Center. He is being held on a $500,000 bond.

According to a search warrant, officers described Harris’s actions last Wednesday as unusual. They say he was mumbling and incoherent.

Detectives are requesting access to the Tahoe’s EDR, or Event Data Recorder, a device that could hold exact information as to how fast the vehicle was traveling along with brake and throttle analysis that may paint a clearer picture of what happened leading up to the deadly crash.