A Nebraska man found paralyzed in his jail cell has asked a judge to dismiss his federal lawsuit against the city of Lincoln and Lancaster County.

The Lincoln Journal Star reports an attorney for Arok Atem filed the motion last week. The filing says there may be an additional defendant in the case but it not elaborate.

Atem was arrested in April 2011 after police suspected he was drunk at a hospital. He was later found in his cell with spinal cord fractures. He is now a quadriplegic.

Atem’s lawsuit said he suffers from mental illness, and police should have known he was a danger to his own safety.

The newspaper reports Atem’s attorney did not respond to messages about any plans to refile the case in state court.