Impaired Woman Kills Grandpa Mowing His Lawn as Wife Watches in Horror

A Colorado woman has been sentenced to four years in prison after driving under the influence of drugs and crashing into a 79-year-old grandfather as he mowed his front lawn, killing him in front of his horrified wife.

Amy Dalton, 38, was sentenced November 3 after being convicted of vehicular homicide while under the influence in the death of Robert “Bob” Selle, a beloved grandfather and former school superintendent.

The devastating crash happened August 24, 2025, outside Selle’s home in Calhan, Colorado, where he was riding his lawn mower on what should have been an ordinary afternoon.

According to investigators, Dalton was driving her 2016 Subaru Outback along North Calhan Highway when she suddenly veered off the roadway, traveling approximately 200 feet along the shoulder at speeds approaching 60 mph.

Her vehicle then went airborne, crashed through a barbed-wire fence and slammed into Selle, throwing him from his lawn mower.

The SUV continued overturning before coming to rest upside down in the field.

Making the tragedy even more heartbreaking, Selle’s wife of 59 years, Donna, witnessed the entire incident from inside their home.

She had been looking through the front window when she saw the speeding vehicle leave the road and strike her husband.

Donna immediately rushed outside, where she found Bob still conscious and able to speak.

But their final moments together were devastatingly brief. He soon lost consciousness and died at the scene.

During Dalton’s sentencing hearing, Donna recalled the horror of watching her husband die before her eyes.

“I couldn’t believe what I was seeing. I was hysterical and couldn’t stop any of it,” she told the court, describing the final minutes she spent with the man she loved.

Investigators later discovered a particularly disturbing detail: Dalton apparently made no attempt to stop the vehicle before the deadly impact.

Data recovered from the Subaru’s airbag control module showed that she never applied the brakes or made an evasive steering maneuver in the seconds leading up to the crash.

A neighbor’s security camera also captured the vehicle leaving the roadway and striking Selle.

When officers questioned Dalton, they reported smelling marijuana and observed behavior suggesting possible impairment. One trooper noted that her eyelids appeared unusually heavy, while emergency responders described her as slow to respond.

Dalton admitted to regularly smoking marijuana, taking prescription medications and recently experimenting with methamphetamine.

A subsequent drug test detected at least two substances that investigators believed contributed to the crash.

Dalton initially suggested that two faulty tires caused her vehicle to behave unpredictably, claiming the steering felt strange before she lost control.

However, investigators found no evidence that she attempted to brake or steer away from danger.

During her emotional sentencing hearing, Dalton accepted responsibility for the deadly collision and apologized to Selle’s family.

“I will carry the weight of this tragedy with me for the rest of my life,” she told the court. “I accept full responsibility.”

Her family pleaded for probation, emphasizing that she was a mother whose young son depended on her. But the judge ultimately imposed a four-year prison sentence.

Before being taken away, Dalton hugged her 7-year-old son and promised she would return.

Just feet away, Donna Selle wept as she watched the emotional goodbye, still grieving the husband she had lost.

Bob Selle was much more than a grandfather of five. He had served as superintendent of the Calhan School District and was deeply involved in his community.

He also founded the Eastern Plains Community Pantry, which provides assistance to more than 1,000 people each month, and was active in his church and the Lions Club.

Those who knew him described him as compassionate, generous and dedicated to helping others. Despite his many accomplishments, his favorite title was reportedly “Grandpa Bob.”

Following the sentencing, Selle’s son, Chris, reflected on the lasting devastation caused by the crash.

“There’s no positive outcome for any of this for anybody,” he told The Gazette. “I’m just glad it’s over.”

Although Dalton’s prison sentence brings the criminal proceedings to a close, the tragedy has left a family mourning a beloved husband, father and grandfather whose life ended while he was simply mowing his own lawn. Gazette+2