Why was Limerick man Jason Corbett killed?

At 3.04am on August 2, 2015 emergency operators in North Carolina received a 911 call from a large four-bedroom home set on a half-acre site on Panther Creek, a quiet cul-de-sac in suburban Davidson County.
“My daughter’s husband, my son-in-law, got in a fight with my daughter. I intervened and I think… he’s in bad shape. We need help,” the 65-year-old caller told operators.