He shouted gun 3 times, but didn't give any instructions the "the man with a gun" before he opened fire. His best bet, is to seek a lawyer and hope this blows over. Hint: it won't.
SHOOTS A MAN 9 TIMES WITH DISREGARD TO MANS LIFE; FILES FOR RETIREMENT SO HE CAN'T BE FIRED FOR SHOOTING UNDERCOVER OFFICER HE HAS WORKED WITH FOR 2 YEARS.