Re: Back in the 90's...
I started work at a site the same week that some incompetent in the Finance department was put on gardening leave for allegedly covering up some expensive cockup he'd made in a finance spreadsheet; it was my job to do a bit of basic forensic work (IT, not the accounting type) on his PC and the server share hosting some of the spreadsheets. I also searched the office for floppy disks (this was in the time of Windows 95) and found some unofficial backups tucked away which contained incriminating versions of the covered-up files.
There was a suspicion that Mr Incompetent would have wanted to get rid of those floppies if he hadn't been frogmarched out by Security, so it wasn't a surprise to hear the following day that he'd been spotted on camera trying to break into his office in the middle of the night. His office window was hidden from the main walk by bushes and they found jemmy marks in the woodwork, plus burn marks where he'd attempted to start a fire once he failed to break in (presumably he chose not to break the glass because it would have made too much noise). He'd clearly given up and walked away, because he was on two of the security cameras, with a hoody and baseball cap obscuring his face. Mr Incompetent lived up to his name by pulling down his hood and taking off his cap the moment he stepped off the property, providing an absolutely perfect mugshot to the camera across the road watching the gate.