Updated

A former BP drilling engineer isn't expected to testify at his trial on charges he deleted text messages about the company's response to its massive 2010 oil spill in the Gulf of Mexico.

According to a trial transcript, a lawyer for Kurt Mix told a judge and prosecutor that her client isn't one of three witnesses whom defense attorneys plan to call to testify once they begin presenting their case on Friday.

Justice Department prosecutors called their final witness on Wednesday. Jurors are expected to hear closing arguments from the attorneys on Monday before they start deliberating.

Mix pleaded not guilty to charges he deliberately deleted text messages to and from a supervisor and a BP contractor to stymie a grand jury's probe of the spill.