I know the pic you're talking about. Im not 100% (since Im in another country to that of my 'library'
) but I think it's in "Friends of the Family". Many sources list Eddie as part of the tragically lame sounding "Fist", comprised on Gotti and pals.
Eddie was a Gambino captain, cousin (there were apparently a fair few Lino's over the years in NY) to Frank (the latter year rat) and Bobby of the Bonnanos. Most sources state the drugs he was into as his primary interest and Casso being involved in the murder, I think not only because he apparently believed Lino may have been behind one of the various hits attempted on him but also because he and Bobby Boriello were feared as guys with enough murderous potential to possibly retaliate for the attempted hit on Gotti (which of course took out DeCicco).