APCORYDON, Ind. (AP) — Authorities say former "Happy Days" star Erin Moran likely died from cancer at her southern Indiana home. A statement released Monday by the Harrison County Sheriff's Department says an autopsy revealed the 56-year-old actress had stage-four cancer, but doesn't specify what type. The department says Moran died Saturday in the rural community of New Salisbury, about 20 miles northwest of Louisville, Kentucky.