A Muslim chaplain for the city’s Department of Correction showed up for work on Wednesday as he routinely does — entering the city jail in Lower Manhattan to minister to some of the roughly 900 male inmates there. But when the chaplain, Imam Zulqarnain Abu-Shahid, flung his shoulder bag onto an X-ray machine at the entrance of the Manhattan Detention Complex, at 125 White Street, officers were alerted to the presence of metal. They found a pair of scissors and three metal blades, the kind used in box cutters, in the bag’s outer flap, the authorities said. Imam Abu-Shahid was...