I'm not finding anything.
If you are looking for the man who was born in 1971, try whitepages.com or fastpeoplesearch.com, or any one of the other thousand people finder sites. I think those two are better than most.
If you are trying to work backward, do that anyway and look on the results page for his parents under "possible relatives" or the like. If you get his father's name - and he has died - it might make it a little easier.
If you are wondering what happened to Karen and her husband, try each name and last known location in Google. If you know they both died, add the word "obituary" to the search. Even if they themselves haven't died, they might show up in an obituary of a parent or other relative. You can try adding "survived by" to the search also.
I tried that for Karen Lindo, hyannis port obituary, but only found a woman who didn't match any of the information you gave. I tried exact date of birth for the son and didn't find him at ancestry.