The really personal effects were thrown out. When someone is killed in the line (and the enemy doesnt get to go through his pockets and pack) he is probably just put in a poncho and then buried in a temporary grave. Later the graves regristration men come back and claim the body for a proper burial.
If he dies somewhere in the rear and still has things like letters and pictures - they are in most cases DESTROYED. Why? Because not all men where angels when in uniform. The general opinion was that there was no point in possibly upsetting next of kin at home with a letter or diary entry that may have a upsetting suprise. IF GI Joe started a second family in Europe, had pornography in his things, etc, there was no need to upset the home folks - they would be upset enough at his death with out embarrassing revelations.
I am not saying that was the case with your deceased - that he had any bad habits, I'm just saying that was how death in combat was very often handled in WW2.
See the Book: "Theres a war to be won" about the US in WW2.