Richard Vieyra was convicted Monday of the first-degree assault in August of his domestic partner.

Vieyra appeared in Lincoln County District Court and pled no contest to the charges.

Police learned of the incidents at 2:05 p.m. on Aug. 8 when a woman went to the emergency room at the hospital and said that Vieyra held her against her will over a period of five days.

The woman said she was severely beaten and strangled unconscious several times. She had significant, corroborating injuries. She told police she managed to escape when Vieyra fell asleep.

Police soon contacted Vieyra and charged him with first-degree domestic assault, strangulation and first-degree false imprisonment. He was incarcerated and bond was set at $250,000.

According to court records, the assaults began on Aug. 3. The woman left him after the first round of beatings, but he convinced her to come back and assaulted her again on Aug. 8. That time, she was beaten so badly she partially lost her sight and hearing. She is still under treatments for those injuries, prosecutors said.

Vieyra’s sentencing is set for Dec. 16 after a pre-sentence investigation.

More than half of the victims of domestic violence suffer a lasting brain injury, according to a recent study conducted for the Brain Injury Alliance of Nebraska.