Six Baltimore police officers charged in connection with the death of a man who received a spinal injury while in their custody want a judge to dismiss the case, saying in court documents they are the victims of an "overzealous prosecution" riddled with personal and political conflicts of interest.

At a minimum, officers said in their motions filed Friday, State's Attorney Marilyn Mosby should be replaced with an independent prosecutor.

The officers maintain Freddie Gray's arrest was legal based on their contention Gray was carrying a type of knife that is illegal.

The officers also allege Mosby had a personal interest in calming unrest in the city that followed Gray's death because her husband is a city councilman.

A call Friday evening to Mosby's spokeswoman for comment wasn't returned.