A senior garda involved in a botched murder investigation in Donegal believed a confession had been signed by the prime suspect.

An international handwriting expert today ruled out claims by a wrongly-arrested murder suspect that detectives forged his signature on statements.

Gardaí in Donegal have erected a blue wall around them that will not be penetrated or demolished, it was claimed today.

A senior garda today denied to the Morris Tribunal today that gardaí held a “one-track” investigation into the death of cattle dealer Richie Barron in 1996.