NEW : Neighbors say he did not hear gunshots . A gang expert doubts it was a white supremacist group , but a former associate thinks it might be . A county official says he 's confident the district attorney 's killer will be caught . " McLelland was the second Kaufman County prosecutor fired in six months .
NEW : Neighbors says he did not hear gunshots . A gang expert doubts it was a white supremacist group , but a former member says it might be . A county official says he 's confident the district attorney 's killer will be caught . Mike McLelland was the second Kaufman County prosecutor slain in two months .