Four Dallas police officers are under investigation after they were caught on video laughing about a disabled military veteran who urinated on himself when he was prohibited from using a restaurant bathroom.

US Army vet Dynell Lane told the Dallas Police Department’s oversight board that two off-duty cops working security at Serious Pizza refused to let him use the bathroom around 2:15 a.m. on June 10 — despite his efforts to show them his medical paperwork documenting his medical issues, The Dallas Morning News reported.