Stivers tells Knoll his partner, P.J., said he heard two gunshots. However he said he saw two flashes, assuming they were muzzle flashes; he never said he HEARD two gunshots.
Gaffney tells Lewis that the Baltimore City Police Department requires officers to salute anyone with the rank of Captain or above. However saluting a superior officer is only required in formal situations such as promotion ceremonies, discipline review boards, funerals or if an officer is being formally reprimanded or when reporting to and being given a direct order by their commanding officer or a senior officer. It would be impractical if junior officers were expected to salute a Captain, Major, Lt. Colonel or Colonel every time they encountered them; this is the same reason the military doesn't require saluting indoors except when reporting to a superior officer. The only exception is that officers are expected to stand at attention and salute the Commissioner or Deputy Commissioner whenever he or she enters a squad room.
When describing the events of the shooting bounty hunter P.J. Johnson defends firing his weapon by saying he saw "two flashes" and assumed they were gunfire. However he fails to mention hearing a gunshot, which is by far the most noticeable part of a gun being fired. By only saying he saw a muzzle flash and not mentioning hearing a gunshot he makes it sound as if he isn't telling the truth.