Mark and Louise O'Connor, and their son Evan, were fatally injured in the brutal attack at their home in Tallanstown, Co Louth, on Monday morning. It is understood that Mark and Evan attempted to flee the scene in search of help when the killer struck. "Both Mark and Louise were passionate advocates for their son Evan and for all autistic people," the statement said. On arrival at the house, uniform Gardaí discovered Mark O’Connor (54), Louise O’Connor (56) and their son Evan O’Connor, (27) deceased. Image: Facebook) Facebook)"The O’Connor family are a very well-known and respected family.