Records show that Oliver was briefly suspended in 2013 following a complaint about his conduct while serving as a witness in a drunken-driving case.
Personnel records from the Balch Springs Police Department obtained by The Associated Press show Oliver was suspended for 16 hours in December 2013 after the Dallas County District Attorney's Office filed the complaint. Oliver also was ordered to take training courses in anger management and courtroom demeanor and testimony.
The personnel records also included periodic evaluations that noted at least one instance when Oliver was reprimanded for being "disrespectful to a civilian on a call." That evaluation, dated Jan. 27, 2017, called the reprimand an isolated incident and urged Oliver to be mindful of his leadership role in the department.
The complaint from the prosecutor's office said the office had a hard time getting Oliver to attend the trial, he was angry he had to be there, he used vulgar language that caused an assistant district attorney to send a female intern out of the room, and he used profanity during his testimony.
"In an email from one of the prosecutors he states you were a 'scary person to have in our workroom,'" then-Balch Springs Police Chief Ed Morris wrote in the suspension findings.
Oliver joined the Balch Springs department in 2011 after being an officer with the Dalworthington Gardens Police Department for almost a year. A statement from Dalworthington Gardens officials on Wednesday included details of that and previous intermittent employment as a dispatcher and public works employee between 1999 and 2004.
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