Adjudications, sure, but not statements to investigators. The sequences is, assuming there is pressure to charge the shooter:
1) Investigator(s) will question all involved, gather evidence and witness testimony.
2) If the DA/prosecutor decides that there were violations of the law that (s)he feels can be successfully prosecuted, charges will be filed.
3) Any lawyer retained by the shooter will immediately file for discovery to learn what evidence and testimony the prosecution has.
4) Case goes to trial and shooter will be able to form a defense based on the evidence obtained via discovery.
The problem is, if the shooter is able to learn about (and view) the video evidence before the investigators question him, he can avoid providing false statements to the detectives. On the other hand, if he doesn't know the video exists, he may well lie to investigators, creating a whole new set of troubles - not the least of which is credibility problems for any future trial.
Allowing the shooter to see first-hand what evidence the police have a their disposal before their investigation is complete is detrimental to the OP.