If any of them have the physical anatomy and sentience for complex speech, I won't be shooting it unless threatened, because if it speaks, it's human and no study will change that.
I really doubt you would be able to stay with the specimen throughout it's study, and I'd imagine a great deal of pressure on anyone in charge of it. That's probably a big obstacle by itself, but if the study would result in a proclamation that there are giant lawless wildmen roaming our forests, well I can see where it goes wrong. Those in charge of it's release might decide it's better for us and them to keep the status quo.
They normally don't mess with us much, but we would want to mess with them more than we do now.
You should understand that I play devils advocate sometimes and it is to try and mirror the public's eye looking at this potential discovery for the first time as a reality.