Sinn Féin failed to return security pass of child sex offender Michael McMonagle

The Assembly Commission oversees the running of Stormont’s Parliament Buildings. Picture: PA

Sinn Féin failed to return the Stormont security pass of a former party employee under investigation for sex offences and also did not alert the Assembly authorities to the allegations, the devolved parliament has said.

The Assembly Commission, the body that oversees the running of Stormont’s Parliament Buildings, also confirmed it only cancelled Michael McMonagle’s pass this week – more than three years after his initial arrest.