The man was originally reported missing to Tayside Police at 11.40pm after his wife became concerned and contacted her son who raised the alarm.
After hours of searching, the pensioner was eventually found safe and well in the flat next door to his own home, where he appears to have let himself in.
He had apparently let himself in. No one thought to check the neighbor's house until after the helicopter search had begun. Link -via Arbroath
I can see why he asked the neighbor if he could come over during the day "just to git away from me kin".