My wife caught me with live ammunition that I kept secretly after I was discharged from the military

(1)According to the police, A took about 10 live ammunition home while discharging from the military
(2)Decades later, in the middle of this month, A’s wife found the live ammunition while cleaning the house, put it in an envelope, and threw it away in a plastic recycling bin of a clean house in Jeju
(3)A clean house official who found this reported it to the police, revealing A’s crime
(4)In a police investigation, A stated that he had collected them one by one during his long military career and that he had brought them when he was discharged from the military, and that he did not know it was wrong