Authorities are trying to determine if the driver’s disability caused a car crash in Gilbert that left a Pinal County sheriff’s son dead at the scene along with a baby.
Gilbert police identified the victims as 22-year-old Cooper Lamb and his 1-year-old daughter.
Pinal County authorities said Cooper Lamb was the son of Sheriff Mark Lamb and the girl was his granddaughter.
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Cooper Lamb’s fiancée, who was the boy’s mother, remained hospitalized in critical condition.
Police said the three were in a car that was struck by a truck around 4:30 p.m. Friday in Gilbert.

The son and granddaughter of Arizona Pinal County Sheriff Mark Lamb have died in a fatal car crash possibly caused by someone driving under the influence.
The truck driver was injured and was arrested on suspicion of DUI, according to police.
That person’s name has yet to be released.
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“Our hearts are broken,” Mark Lamb said in a Facebook post. “We are praying for our precious Caroline who is still in critical condition. We would also like to express our gratitude to the citizens and first responders who provided air to our son Cooper and her granddaughter.”
“This is heartbreaking. Something no parent should have to go through,” Arizona Gov. Doug Ducey said in a statement. “My prayers go out to Sheriff Lamb, his wife Janel and his family.”


