Fascinating case. I'm British and I have researched my family tree and William is a common name in my family. I would say its not been common to abbreviate William to Wm since the 1950s - I think the very latest I saw it was in the early 1970s in a telephone directory. So even in 1980, I would find it an odd abbreviation. Very much feels like someone say it written down like that "Wm L Toomey" in a directory or document or something and that's where the name was from. I doubt it has any meaning other than the desire for a pseudnoym.
If this is James Thomas Cole, he served time in prison in the 1970s. I would assume your fingerprints are on record if you have been to prison in the US? Sure it would be easy to rule him in or out on that basis?
If this is James Thomas Cole, he served time in prison in the 1970s. I would assume your fingerprints are on record if you have been to prison in the US? Sure it would be easy to rule him in or out on that basis?