Terror in the Sunlight — Jean Hager

Chilton, a small southwestern town, seemed far too peaceful to be the scene of a triple murder. Yet it had been, and after a year, the peace was beginning to return though the murders remained unsolved.

Gwen Potter, the pretty high school English teacher, had been unable to recognize the man fleeing from the house where she discovered the bodies because she'd been blinded by the setting sun. But one year later, with interest in the case revived by an enterprising reporter, she suddenly recalls one significant detail. Unfortunately, she makes the mistake of mentioning it while being interviewed for television--and the killer is watching!

The murderer can't take the chance that Gwen may remember even more of what she saw that day at the house on the hill.