Sudanese police said Wednesday that suspects had been arrested in the killing of a police officer during anti-coup demonstrations that have continued in the country. The alleged killing happened on 13 January during a protest in the capital, Khartoum, police said in a statement, as it pledged to reveal “all crimes against demonstrators and regime forces.” The interior ministry had previously announced the arrest of one suspect in the killing of Brig. Ali Bareema Hamad and the apprehension of four others. The police officer’s death was the first fatality in the ranks of security forces since th…