A young child who was in the house at the time was not injured.
Lisa Dorrian disappeared after a party at a caravan site 14 years ago.
In 2010 Cahill alleged that she was raped by an IRA member when she was 16-years-old.
The 56-year-old remains at large after he did not return to prison on Sunday.
Dónall Ó Cualáin has held the role since former commissioner Nóirín O’Sullivan retired last year.