The 49 year old was shot dead with his own gun in Castlerea Co. Roscommon late on Wednesday night.
Hundreds of people attended a vigil in the town last night.
This woman says she felt it was important to show support for local Gardaí.
A separate memorial service was held in Castlerea yesterday afternoon for Colm Horkan's Garda colleagues.
Garda David Conroy attended the event - he's been paying tribute to the 49-year-old.
