HOLLIDAYSBURG, Pa.—A woman wounded when a soldier fatally shot two other people in connection with a central Pennsylvania sandwich shop robbery is suing the convicted gunman and his parents who, she claims, provided the weapon he used.

The attorney for Daniel and Karen Horner, of Johnstown, declined comment Monday on a lawsuit first reported by the Altoona Mirror ( http://bit.ly/SHds5V).

The lawsuit was filed by 36-year-old Michelle Petty who was shot in the hip when Horner also fatally shot another clerk at the Altoona Subway shop and, later, a 64-year-old bystander in April 2009.

Nicholas Horner, the soldier, is serving a life sentence for the shootings after unsuccessfully arguing that his post-traumatic stress disorder was to blame.

Petty's lawsuit contends his parents shouldn't have let him use the gun, given his mental state.