HOUSTON – The family of George Floyd, a black man who died in Minneapolis police custody Monday night, is mourning his death. A bystander’s video showed him pleading and groaning that he could not breathe as the officer knelt on his neck. RELATED: Man who died in Minneapolis police custody was Houston native, former neighbor saysTerrell, who affectionately referred to Floyd as “Uncle George” because of their age difference, said the violent video was “heartbreaking” to watch. “He was driving trucks to provide for his family.”Earlier Tuesday, four Minneapolis police officers were fired after public outrage erupted over the video and how Floyd was killed. Black Lives Matter Houston said they are protesting at Discovery Green in his honor at 2 p.m. Friday.