Bizarre Frankie, the inherited #cat, story.
Have collar with name tag & #smarttag as still roams to visit old home about 1km away.
He arrived home without collar/tag, is designed to release, not strangle.
I tracked to a neighbour's SUV, on their drive, it 'beeped' near front with tag chime. Could not see it, they opened bonnet & found collar, tag attached, dangling off a metal pipe that ran across behind the top end of the engine!
Modern car, had squeezed up thru undertray hole by exhaust...