Not much grey area here...
Statement from Ty Votaw, PGA TOUR Executive Vice President
We are aware of the incident involving Tripp Isenhour at the Grand Cypress Golf Club in Orlando last December that resulted in the death of a protected migratory hawk. Obviously, any set of facts which involve an individual hitting a golf ball at a living target is clearly inappropriate behavior.
Tripp has publicly apologized and has expressed remorse and regret about his actions. We find this entire incident regrettable and unfortunate.