Throwback from my public FI days where "digital tampering" was a get-out-of-jail-free card
(we went one further; sealing the SD-card in an evidence bag on the scene until we got home,
burnt a mastercopy onto a Write-once CD, which got sealed in an evidence bag etc.)
As a private FI, it's never come up.

Memory is cheap nowadays.
My RAW files are about 16MB each; 500 to a $50 8MB SD card;
I download to a $100 1TB harddrive, and batch-process to smaller .jpeg's using Adobe Photoshop.

I still use RAW simply because it's lossless and better when trying to pull out finer detail.