One place I worked, one of the long term, most reliable employees, an older guy who did half the scheduling, and always cheerfully volunteered for the unpopular shifts, didn’t show up one day. Not just any day either, it was payday and we had to show up to collect it.
His phone appeared to be switched off, and when he still hadn’t called or appeared by the end of the day, the boss phoned in for a police welfare check.
They went round the house, and… nothing. He’d just had a few days off, and the flat looked like he hadn’t been there for them.
They tried to trace his (old banger) car, and found it parked up in a backstreet somewhere, nowhere near any of his known regular haunts. He was an older guy, and not in great health, so hospitals were called to see if any unidentified unconscious people/bodies had been brought in with his description. Nope, nothing.
It was about a week later, when the boss was trying to see if he could trace the missing guy’s adult son, on the basis of a possible name and that someone said he thought he lived in or near London, when the boss’s wife, filling in paperwork, noticed a slight discrepancy in the takings the guy had reported for the last week on one of his shifts (which was manning the gate in a car park)…
It eventually turned out that when he’d been doing the unpopular early morning car park shift for the past year, he’d been fiddling the books and pocketing part of the takings, completely unnoticed. When I quit the job a year later, the police welfare check had turned into a warrant, but they still hadn’t found him.