Question

The most important part of robbery investigation's is establishing what

Answer 1

The most important part of robbery investigation's is establishing The RAND Corporation Study Focused on investigation 
hope this helps

Answer 2

"What object was stolen and what person / organization"

Theft is a crime against property, consisting in seizing other people's property, using force in things or violence or intimidation in people. It is precisely these two modes of execution of behavior that differentiate it from theft, which only requires the act of empowerment.