In the bad old days when I was a bike bum travelling the country to do races and sleeping wherever I could, I engraved my last name on my frame BB, fork steerer and other major parts like cranks and wheel rims for future identification if my bikes were stolen and parted out. I recovered some wheels this way, finding them a month later at another race. I always record the frame serial number to give to the police if it is stolen. Needless to say, I have photos of all my bikes. I hope you recover at least some of your parts, although I'd caution you against engaging in vigilante justice.