Frank Shoots Every Member of the Gang
Criminal Activities
Aggravated Assault
Using a firearm to intentionally or recklessly inflict (or attempt to inflict) serious bodily injury on another person. Under U.S. law this typically constitutes aggravated assault or assault with a deadly weapon and is a felony in most jurisdictions.
Situation:
"Frank discharges his handgun at other characters multiple times during the episode. Early on he shoots Dennis and Dee (Dennis: 'You shot us! I got shot in the face!'), and by the end he 'officially shot everyone in the bar.' Those shootings caused bodily injury or put people in immediate danger."
Property destruction
Intentionally damaging another person's property (shooting or otherwise impairing doors, locks, vehicles or fixtures), which can be prosecuted under criminal mischief/vandalism statutes.
Situation:
"At one point Frank fires at a lock/door ('Take that, lock.'; 'And the door wasn't even locked. You're paying for that door, Frank.'), damaging property by discharging his firearm."
Reckless Endangerment
Conduct that creates a substantial risk of serious physical injury to another person; when victims are minors this commonly qualifies as child endangerment or child neglect under U.S. law.
Situation:
"Throughout the episode Frank handles and fires a gun in public places (a bar/restaurant, in cars, on the bridge/beach), repeatedly claiming or implying it was unloaded and otherwise acting without regard for others' safety (including letting people handle/scratch him with the gun and firing it around the group)."