Published: Sep 29, 2012 10:40 PM EDT
Updated: Sep 29, 2012 10:49 PM EDT

COLLIER COUNTY, Fla. - Florida Highway Patrol is investigating a deadly hit and run in Collier County. 48-year old Robin Wallace was riding her bike east on Estey Avenue when she was hit by a vehicle.

The driver never stopped and Wallace was pronounced dead at the scene.

Jim Wallace says he's still in shock.

"I got here and seen the highway patrol and I dropped right to the ground. I just don't know what to do right now," Wallace said.

Jim and Robin shared 28-years of marriage and have two grown children. 19-year old Richard Wallace says his mother was his best friend.

"Amazing. She was everything you ever wanted in a parent," he said.

Now, her family is looking for answers and hoping witnesses will step forward.

Around 11:30 am, Wallace was riding her bicycle East along the edge of Estey Avenue. State troopers say, for unknown reasons, Wallace was struck by a vehicle there and killed. Neighbors in the area called for help.

"It was crazy. I was a sad scene. They just put sheets on top of a bike and something else," resident Harley Rogan said.

Wink News spoke to bike riders in the area, who say they've experienced scary run-ins with careless drivers.

"You become invisible. Blatant disregard for cyclists," one cyclist said.

Another rider said she has been hit by a driver who never stopped to make sure she was okay.

"We were crossing the road he hit us and by the time i realized what had happened got up and looked he was flying down airport road, i couldn't get his license plate number, he was going too fast.

"I just want someone to give me an answer what happened. Highway patrolman said there were skid marks, but the bikes was okay. I'm not getting any answers from anybody," Wallace said.

Anyone who may have witnessed this crash or has any knowledge about the identity or location of the driver is asked to contact FHP.