Maybe I'm being a spoil sport but this seems like a cover to me. Like maybe it was "a burgler" but that person was someone's older brother who knew what they were going to find.

I just don't see the circumstances for a random burglar to be snooping through folders close enough to find the presumably relatively hidden items they'd need to find, let alone that happening alongside the low odds an actual burglar would risk their own security to do the right thing.