Still, several victims claim this is all part of a British deal for access to Libya's oil riches - a deal struck two years ago by then British Prime Minister Tony Blair. The British foreign office insists that no such deal exists and that the decision to release al-Megrahi was made solely by the Scottish authorities. In recent years, overseas energy companies, including the U.K.'s BP PLC, have moved into Libya to exploit its oil and gas resources.
Libyan leader Moammar Gadhafi has been pushing for al-Megrahi's release. Last year, the United States and Libya signed a compensation deal for the U.S. victims of the Pan Am crash, following Gadhafi's renunciation of terrorism as a state policy and his decision to end the country's nuclear program.
The Associated Press contributed to the reporting of this story.