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The man accused of killing a woman at a Rapid City motel in March is facing a new charge of assaulting a law enforcement officer.

Vincent Mousseaux, 24, is charged with simple assault against a correctional officer at the Pennington County Jail in July. He was earlier arrested and charged with murder in the fatal stabbing of 30-year-old Deziree Martinez at the Price Motel.

At a hearing Friday, Mousseaux’s lawyer, John Murphy, asked the 7th Circuit Court to appoint him to also handle Mousseaux’s new charge.

According to a law enforcement report obtained from the county courthouse, Mousseaux admitted attacking Correctional Officer Joe Brown and attributed it to his low mood. He said there was no reason for hurting the officer.

“Vincent told me he was very emotional and that he ‘let my emotions get the best of me,’” the report by Sheriff’s Deputy Justin Grable reads. “I asked him why he was emotional and he stated that he was (sic) just been sad lately.”

Jail surveillance video shows Mousseaux punching Brown in the face after the officer entered his cell, according to the report. Brown told Grable he heard Mousseaux coughing, sounding like he was choking, and went to check on the inmate.

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Brown pushed Mousseaux away and sprayed him with pepper spray, the surveillance video reportedly shows. But Mousseaux was apparently able to slap the spray away and use it against the jail officer. Brown was eventually able to get Mousseaux on the ground until assistance arrived.

Brown was taken to Rapid City Regional Hospital for treatment of minor injuries on his face and arms, Grable’s report states. Brown said Mousseaux had punched and slapped him in the face and was able to scratch him in the face and arms while being held on the ground.

Mousseaux will be formally read his new charge in court on Friday. The court agreed to appoint his existing lawyer to the case. The next hearing on Mousseaux's murder case is set for Oct. 27.

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Cops and Courts Reporter

Cops and courts reporter for the Rapid City Journal from February 2016 to July 2018. Contact her on Facebook or Twitter @tiffgtan.