If your in the military can you get arrested for adultery and staying in the barracks wen ur not supposed to?

i have a friend who commited adultery on his wife and he is in the military then after that happened he was stayin in his friends room in the barrracks and i know he wasnt supposed to. this all happened in one week. can he get arrested for this immediately? he is currently being interrogated by the MPO and as been for about 4 hours.