Re: Where in the world is Davin Blakely?

try when you launch your game  play for a few to let it settle then pause it go to map view hit M and see if you can find the house he lives in once you find out where he lives then go over to visit him , or if he is out somewhere it may give a clue like Davin is not at home right now he is at the park then go there to find him , if he is gone from the game you'll have to cancel the opportunity  because you won't be able to fulfill it

although with the story progression Sims die and or are moved out of the town at any time whenever the town is considered to be overpopulated, in essence  making player's Sims to lose their friends randomly without warning so that could have happened too

edit typo