Still alive in Cuba, variously reported as *under detention* or under arrest, depending on the source and translation. You may be thinking of the Chicago Mob/Outfit's *Hollywood Ambassador* John Roselli, found in an oil drum after having been garrotted and possibly shot; his legs had been hacksawed off to allow him to fit in the drum and there was evidence it had been done while he was still alive. A .22 pistol traced to Miami and modified with a CIA type silencer had been used previously in the Chicago hit of retired Outfit boss Sam Giancana, and Roselli had been subpoenaed to testify as to his role as a go-between in the CIA's attempts to have former Outfit assets in Cuba kill Fidel Castro; he conveniently *disappeared* before he could so testify to the Senate Select Committee on Intelligence. Just a coincidence, I'm sure.
A couple of years back, when the international court case against the Libyans accused of the Lockerbie Pan Am 747 bombing were about to begin their court proceedings, the British very much wanted to question Terpil about his having supplied the Libyans certain explosive detonator circuitry and his training them in their use. The Brit inquiry was reported in an Issue of U.S. News and World Report, approximately a full-page article.
The British have no sense of humour about Wilson and Terpil's activities on behalf of first Idi Amin, then Manuel Noriega, particularly in the aftermath of Various claims were made that the weapon used was supplied by Wilson; certainly some weapons supplied by him were found in the facility. A New York Times report claimed a British-built Sterling submachinegun was used, at the time a standard issue weapon to Libyan army and police units, though that seems less likely. The shooting was seen live on British BBC-TV.
More on Frank Terpil and his partner/boss Ed Wilson *here*