Murder on the Rocks

Judy stood at the edge of the cliff, scream after scream pouring from her throat. Diane grabbed the young girl by the shoulders. Judy crumpled against her. "I thought it was you." she sobbed. Then Diane saw the twisted body sprawled on the rocks below. "It could have been me", she thought. Strange things had occurred since she had arrived at her Grandfather's home. She had come to rest and recover from the car accident, that had killed her husband, but rest she had not found. Who wanted her out of the way? Why?