This is classic nerd thinking they're so clever stuff - judges see right through that.
If you've never destroyed a tape before but suddenly start doing it after an incident it won't go well for you. Even if you do get off it'll be a painful process.
The only way to do this safely is good old records management - routinely and boringly destroy records on a regular cadence. Preferably automatically. If you become aware it may be subject to a police investigation then take action to preserve it.
If you don't want to do any of this the best option is to just not keep the record at all - don't make a recording.
If you've never destroyed a tape before but suddenly start doing it after an incident it won't go well for you. Even if you do get off it'll be a painful process.
The only way to do this safely is good old records management - routinely and boringly destroy records on a regular cadence. Preferably automatically. If you become aware it may be subject to a police investigation then take action to preserve it.
If you don't want to do any of this the best option is to just not keep the record at all - don't make a recording.