HOUSTON (AP) — Deputies did not conduct a complete search of a Houston-area high school student who had threatened to hurt himself and failed to find a hidden gun he used to shoot himself with while handcuffed in the back of a patrol car, officials said Thursday.

A full search wasn’t done because the 17-year-old student was not under arrest and had only been detained Wednesday at his campus so authorities could get him help, said Capt. Jon Moore with the Harris County Precinct 3 constable’s office.