GENEVA N.Y. — A clear sunny day set for family fun turned deadly for a Geneva couple.

“We were going to spend the afternoon out at the lake,” said Greg Sterman. 

He was driving on Routes 5 and 20 when his girlfriend of 11 years, Barbara Amidon, 74, was killed Saturday. A rock broke through his windshield, striking her in the head.

“So quickly it was over,” said Sterman. “It turned around into a tragedy.”

Before the incident, they had goals; one consisted of buying a home.

Reflecting back to more than a decade ago, Greg says he will never forget the day he met the person he describes as the most kind, outgoing and loving woman.

“She came up and just started talking with me and we got to chatting and before long we danced together and that was the beginning” of what Sherman says was an undying friendship.

 “I’ll always remember, she would just sit there and hold my hand while watching TV and it was the type of affection she’d show people,” says Sterman. “I was with her holding her hand until she passed, like she always did mine.”

Investigators say they believe a rock about five inches wide and two inches thick was kicked up by a truck and went through the windshield, striking Amidon in the head.

Sterman says the incident took place after a rock was tossed from the rear of a commercial tractor trailer, according to the Ontario County Sheriff’s Office.

Deputies are searching for the commercial vehicle.

Anyone with information is asked to call the Ontario County Sheriff's Office at 585-394-4560.