Tragic details emerge after Pinal County sheriff Mark Lamb's son & 1-year-old granddaughter killed in Arizona car crash

THE son of an Arizona sheriff and his 1-year-old daughter have been killed in a horrific car crash.

Pinal County Sheriff Mark Lamb’s son Cooper, 22, was killed in the crash Friday along with his child.

Cooper's fiancée and the mother of his child was also seriously injured and is currently in critical condition, police said.

"Please keep the families in your prayers and respect their privacy at this time," they shared in a statement on Twitter.

👉 For more insights, check out this resource.

Cooper and his child were passengers in the vehicle reportedly driven by Cooper's fiancée.

They died at the scene after life-saving measures were attempted, AZ Central reported.

👉 Discover more in this in-depth guide.

She reportedly turned and was hit by a pickup truck in a T-bone crash at 3.45pm, KOLD reported.

The driver of the truck was reportedly was uninjured and driving the speed limit.

However, he was allegedly taken into custody for possible impairment.

"Oh my gosh. The truck just slid in and I knew there was going to be accidents here," Jason Vaught, a witness at the scene, said in surveillance footage obtained by ABC 15.

"I thought it was for sure a bookcase that fell over. It was just so loud, and almost the whole block came out to see it. That's how loud it was."

Vaught and his family went outside to help, and saw responders giving aide to the child.

"It's just painful to watch. Especially because there were some people that lost their lives," he said.

Lamb took to Facebook Saturday to express his gratitude for the well wishes.

"We are truly humbled and touched by the outpouring of love from our Family and Friends/Community. We cannot thank you enough," he said.

"Our hearts are broken but we are comforted in your love and the love of God and Jesus Christ.

"We are praying for our precious Caroline who is still in critical condition.

"We would also like to express our gratitude for those citizens and first responders who rendered aid to our son Cooper and our granddaughter. God Bless you all!"

Officials took to social media to shared their condolences with the the sheriff and his family.

"I am deeply shocked and saddened to learn of this devastating loss to Sheriff Lamb's family," Democratic Senator Krysten Sinema said.

"All of Arizona is sending our love, strength, and condolences to them in this unimaginable time."

Governor Doug Ducey also sent well-wishes.

"This is heartbreaking. Something no parent should go through," she said.

"My prayers go to Sheriff Lamb, his wife Janel and their family. May their loved ones rest in peace."

The U.S. Sun has reached out to the Sheriff's office for additional information.