Does anybody know how long the DM/RM/HR has access to camera footage from each store?

There have been some pretty consistent issues with senior staff behavior in my store. I know some camera systems only keep footage for a limited time, however. Does anybody know how long store camera footage is available for review by the DM, RM, and HR? If I keep a record of the dates and times of these instances how long before that record is useless if camera review is necessary? I don't feel comfortable sharing the behavior I'm concerned about on reddit as it would (hopefully) make it pretty obvious to anybody with knowledge of my store.

Thanks for your help!

PS fuck those dumplings!