Missouri City and its police department are facing a lawsuit following a fatal crash last month.

A lawsuit has been filed on behalf of a man found in the back of a Missouri City police cruiser hours after a crash last month.

While responding to a robbery, officer Blademir Viveros crashed into a 2005 Toyota Corolla, killing its driver, 16-year-old son, Mason Stewart, and his mother, Angela Stewart.

Missouri City resident Michael Hawkins was in the backseat of the police cruiser when the crash took place.

According to the lawsuit, Hawkins has been partially paralyzed as a result of the crash.

"He is currently unable to move or feel his lower extremities and has lost use of one of his upper extremities," the lawsuit said. "It is anticipated that he will remain hospitalized and will continue to receive treatment for the foreseeable future."

The lawsuit, which was filed last week, names Missouri City and its police department as defendants. It is seeking more than $1 million in damages.

Viveros was driving on Cartwright Road in Missouri City around 8:45 p.m. on June 20 when he crashed into the Toyota Corolla. The Texas Department of Public Safety said that Stewart did not yield the right-of-way when pulling out of a parking lot.

However, DPS also found that Viveros had not activated his emergency lights and was driving above the speed limit.

Missouri City Police Chief Brandon Harris told reporters that officers were prohibited from responding to calls when someone is in the back of their vehicles. Viveros has been relieved of his duties.

Missouri City could not be immediately reached for comment on the lawsuit. A law firm representing the plaintiffs was also not immediately available for comment.