We are hearing for the first time today from the family of the man who died while out on his morning bike ride.
He was a well-respected neurosurgeon, and in a tragic twist, his father died a year ago the same way. He was also hit by a car while out riding his bike.
Just 38 years old, Dr. Marwan Maalouf, a prominent valley neurologist, was killed in Fountain Hills a week and a half ago.
"It's so unbelievable. It's hard to absorb," says Khaled Maalouf, the victim's brother.
Khaled spoke to us via Skype from Montreal, Canada about the toll his sudden death has taken on the family.
"He was respected by all his colleagues, his fellow doctors. I mean we are so sad it's unbelievable. We still can't believe what's happened," says Khaled.
Dr. Maalouf was a lead researcher on Parkinson's and Alzheimer's disease at Barrow Neurological at St. Joseph's Hospital in Phoenix.
"He was trying to make a name for himself in the medical community and he was working... researching Alzheimer's and Parkinson's disease, about to present some new findings."
Police arrested 33-year-old Nicholas Linsk after Dr. Marwan's death. A witness saw Linsk not far from the accident scene, checking his car for damage.
After his arrest, Linsk told deputies he thought he hit a guard rail.
"We are more than sad, we're feeling very angry right now."
Dr. Maalouf's brother says the family would be more understanding if Nicholas Linsk had stayed at the scene after the collision. Linsk is facing a felony charge of leaving the scene of a fatal accident.
Dr. Maalouf is survived by his wife Nicole.
Follow this story: Neurologist riding bike killed in hit-and-run