Investigation into detective garda's murder progressing 'at rapid speed'

The late Garda Colm Horkan. 

The investigation into the murder of Detective Garda Colm Horkan is progressing at "rapid speed", a court has been told today.

Sergeant Mark Mahon told Judge Alan Mitchell at Harristown District Court in Castlerea, Co Roscommon, that "numerous detectives and senior officers" were working on the case.