Gardai probing the brutal attack on pensioner Tom Niland have trawled through 400 hours of video and dash-cam footage in a bid to catch his assailants.
It is understood DNA samples have been taken from the clothing and under the nails of the Sligo man and investigators are hopeful it will help to progress the case.
A source said: “It’s thought there was a struggle when three masked men first entered the house and DNA that can link the attackers to Tom and the crime scene could prove to be vital.”