Séamus McElwaine judge describing him as a "dangerous killer" and recommending he spend at least 30 years in prison. On 25 September 1983, McElwaine was involved in the Maze Prison escape, the largest break-out of prisoners in Europe since World War II and in British prison history. 38 republican prisoners, armed with 6 handguns, hijacked a prison meals lorry and smashed their way out of the Maze prison. After the escape he joined an IRA Active Service Unit operating in the area of the border between Counties Monaghan and Fermanagh. The unit targeted police and military patrols with gun and bomb attacks,
Mountjoy Prison helicopter escape observed already, as other Ministers are wont to use State cars. The IRA released a statement on the escape, which read, "Three republican prisoners were rescued by a special unit from Mountjoy Prison on Wednesday. The operation was a complete success and the men are now safe, despite a massive hunt by Free State forces". Shortly after the escape Twomey gave an exclusive interview to German magazine "Der Spiegel", where the reporter said people throughout Europe were joking about the incident as "the escape of the century". Irish rebel band the Wolfe Tones wrote a song celebrating the escape called