Larry Gallo matches up mostly for being the informant. The friend who became a cop when they grew up is mentioned in the memo and did not click till reading what CF had said in a short interview growing up in the Gallo household. Joe was locked up at the time, while Albert Gallo and Frank Illiano would sneak across the bridge to Manhattan to hideout with a couple of Genovese people for a few nights, and the fact the report does not give any information on that rules out Albert and Frank being the informant since they would not have mentioned big details, but little things as to not hurt whoever they were with. Process of elimination on dates also points to Larry as the informant.