Triple murderer Andy Cash casually danced at family party hours before killing his siblings

Andy Cash murdered his sister Lisa Cash (18) and their eight-year-old twin siblings Christy and Chelsea Cawley

Robin Schiller and Eoin Reynolds

Andy Cash was filmed casually dancing at a family gathering just hours before he murdered his siblings.

The triple killer appeared ­relaxed at the gathering with relatives, but shortly afterwards he returned to his family home and carried out the crime.