The former deputy first minister was once a feared IRA sniper but became a central figure in the move towards peace.
Fresh allegations have highlighted the uneasy relationship between paramilitary groups and the security services during the Troubles.
The Good Friday settlement has kept the peace, but the system is plagued by built-in instability.
It's marching season in Northern Ireland and tension is inevitable.
Revelations on the BBC's Panorama confirm what many Northern Irish already knew: justice is not for everyone.