SAN TAN VALLEY, AZ — ABC15 has learned that the son of Pinal County Sheriff Mark Lamb is being booked into jail Wednesday evening.
Cooper Lamb is facing felony charges of aggravated assault and possession of dangerous drugs, connected to a near-fatal crash from July 8, 2020.
Cooper is accused of smashing into a bicyclist after veering off the road.
ABC15 pushed for the full police report and first reported in November that the report showed the 20-year-old to be "impaired by a Central Nervous System depressant and Cannabis and unable to operate a motor vehicle safely.”
Sources tell ABC15 Cooper self-surrendered Wednesday afternoon.
His father, the top law enforcement official in the neighboring county, was not with him.
MCSO investigators waited roughly six months for the toxicology results to come back. ABC15 has reported that the DPS state lab has a serious backlog, but the results took much longer than normal.
According to court paperwork, a blood sample taken from Cooper Lamb showed that he had Etizolam in his system as well as Alprazolam.
Etizolam is a thienodiazepine, which depresses a person’s central nervous system to help with insomnia and anxiety.
Alprazolam is also commonly used to calm the body and treat anxiety and panic disorders.
The victim in this case is still planning to file a civil lawsuit and wants to see "justice served." He tells ABC15 has been permanently injured.
ABC15 reached out to Sheriff Lamb for comment. We have not heard back but will update this story as we learn more.
MCSO said in a statement, in part:
"[Lamb] is currently in MCSO custody and will be booked into our Intake, Transfer and Release facility then processed to appear in front of a judge. Additional information will be shared once available."
The agency did not say when Cooper was first notified of the charges or how common it is to allow suspects, facing these charges, to self-surrender.