In a tragic incident in Colorado, a man known affectionately as “grandpa” was killed while mowing his lawn on a riding mower. The accident occurred when a Subaru, driven by a woman under the influence of marijuana, veered off the road and struck him. This heart-wrenching event unfolded as his wife looked on in horror from their home.

According to police reports, the victim’s wife was watching her husband from the window when she saw a silver car speeding down the road. The vehicle became airborne, colliding with her husband and sending him flying off the lawn mower. She rushed outside to be with him in his final moments, sharing a few words before he passed away on their front lawn.

The driver, identified as 37-year-old Amy Dalton, has been accused of vehicular homicide. She reportedly admitted to using marijuana and other substances prior to the incident, which took place on August 24, 2025, in Calhan, a small town about 80 miles southeast of Denver.

The horrific scene was captured by a neighbor’s security camera. The footage reveals Dalton’s 2016 Subaru Outback leaving the road, becoming airborne, and crashing into Robert “Bob” Selle. The vehicle subsequently hit a barbed wire fence before careening into the yard where Selle was operating his lawn mower.

Further details from the police affidavit indicate that the Subaru overturned multiple times, ultimately coming to rest on its roof. Selle was thrown from his mower and landed near the overturned vehicle, illustrating the violent nature of the crash.

Cops say the security footage shows “the Subaru as it’s overturning” before colliding with Selle. “The Subaru continued overturning in the field, coming to rest on its roof,” the affidavit says. “Selle was knocked from the lawn mower and came to rest on the ground near the Subaru.”

Selle was initially responsive “and talking with his wife, who witnessed the crash,” before he became unconscious and died at the scene, according to police.

“For no obvious reason at the time, Dalton failed to maintain control of the Subaru and the vehicle drifted off the right/west side of the roadway,” the affidavit alleges. “After analyzing the Subaru’s ACM [airbag control module] data, it’s clear that Dalton never applied the brakes or applied any evasive steering input in the seconds leading up to the crash.”

Cops spoke with Dalton after the crash and reported “a strong odor of marijuana coming from her,” according to the affidavit. She allegedly admitted that she “consumes marijuana daily” and takes “multiple medications,” while also confessing that she “had recently tried methamphetamine for the first time.”

Cops who interviewed Dalton said she seemed “mellow” and was “not very responsive” to EMS questions or treatment. One trooper noted afterward that her eyelids “seemed very heavy,” per the affidavit.

Dalton allegedly blamed the crash on having “two bad tires” that she claimed caused her to drive erratically.

“Dalton also explained that she thought she overcorrected but could not expand on that,” cops said. “Dalton explained that the steering began to feel ‘weird’ and ‘funny.’”

Dalton agreed to a voluntary drug test, which showed at least two substances in her system that police say contributed to the crash. She was arrested and charged with vehicular homicide, driving under the influence, reckless driving and operating a vehicle without insurance.

Selle’s obituary describes him as a “pillar” in the communities he lived in over the years, as well as a loving husband and grandfather of five.

“As condolences continue to pour in, Bob Selle is being remembered as a legacy, an inspiration, a hero, a great human being, a role model, kind, caring, generous, an amazing person, a class act, a loving husband, a teacher, a leader, a great man, one of the best, and as respect personified,” the obituary says. “And yet, of all these descriptors, his favorite one was ‘Grandpa Bob.’”

Dalton is currently out on a $10,000 bond. She is due in court for a preliminary hearing on March 17.