Originally posted by Ponders:
What happen if you return liao, people still scold you, say, my wallet use to have $1500. WHy now $1000?
Return the wallet anyway, and explain nicely that that was all that you found.
If he doesn't accept your explanation, walk away and let that ungrateful wretch wallow in his anger. All that matters is that you did the right thing.
If he dares to file a police report against you, your defence will be that if you had been a thief, you would have taken all of the money and would not be so stupid as to spend only some of it and return the rest to him.
In the end... just do the right thing.