OWINGS MILLS, Md. (WJZ)—Baltimore Police Commissioner Anthony Batts has suspended some training academy staff after a campus police trainee was shot in the head by an instructor on Tuesday. That trainee is fighting to survive inside Shock Trauma right now.

Derek Valcourt has the latest on that trainee’s condition and what went wrong.

WJZ has learned that one of the officers at the training exercise put his service weapon back on before going to lunch. When he returned from lunch, he did not switch out his service weapon with the simulation training weapon that they are supposed to use.

As medics rush a University of Maryland police trainee in his 40s onto a waiting Medevac helicopter, Sky Eye Chopper 13 catches officers consoling each other after what police label a tragic accident at the site of the old–now abandoned– Rosewood psychiatric hospital in Owings Mills.

The victim’s family has asked not to release any information about his identity. He remains in critical condition.

It’s unclear what exactly happened. So far investigators will only say the trainee was taking part in a city police training exercise when he was somehow shot in the head with live ammunition by a city police training instructor.

The news outraged Baltimore’s mayor.

“There’s no acceptable explanation why live rounds were used during a training exercise. I was so angry. I was almost speechless,” Mayor Stephanie Rawlings-Blake said.