Investigators say digital records helped trace two vehicles from a Littleton collision to a fatal shooting minutes later.
JEFFERSON COUNTY, Colo. — A recorded emergency call and images from roadside cameras helped investigators connect a Highlands Ranch couple to a fatal shooting that followed a traffic collision, according to arrest documents and the Jefferson County Sheriff’s Office.
Steven Simpson, 25, is accused of first-degree murder in the July 25 death of Andrew Bott, a 23-year-old passenger in a blue Ford pickup. Simpson’s wife, Corryn Simpson, 26, is accused of being an accessory to a crime. Both were arrested July 29 and are presumed innocent unless proven guilty.
The investigation drew on records created during the encounter, including emergency calls, images that tracked the vehicles and evidence recovered near the shooting scene and at the couple’s home. Authorities said those records challenged the Simpsons’ claim that they stopped following the pickup and returned home after a police dispatcher’s warning.
The incident began at about 10:28 p.m. near West Belleview Avenue and South Santa Fe Drive in Littleton. Corryn Simpson called police and reported that the pickup had struck the couple’s white BMW before leaving, according to the sheriff’s office.
She told the dispatcher that the BMW, driven by Steven Simpson, was following the pickup. The dispatcher instructed them to end the pursuit, investigators said.
Authorities allege that Steven Simpson can be heard making a threatening statement as the call continued. Two apparent gunshots were recorded a short time later. The words and sounds on that call became a central part of the investigation, Jefferson County sheriff’s spokesperson Jacki Kelley told Colorado Public Radio.
At 10:32 p.m., four minutes after Corryn Simpson’s call began, the pickup’s driver contacted Jeffcom 911. He reported that someone had followed his vehicle and opened fire, striking Bott in the passenger seat.
The dispatcher directed the driver to the Columbine High School parking lot. Deputies and emergency medical workers met the pickup there and began treating Bott. He was taken to a hospital, where he died.
Investigators found two spent 9 mm cartridge cases near West Dorado Avenue and Grant Ranch Boulevard, the affidavits said. That location helped establish where authorities believe the shots were fired.
Images from a network of automated roadside cameras also showed the locations of the BMW and pickup during the encounter, according to investigators. The images placed the BMW near the pickup’s passenger side, where Bott was sitting.
The pickup driver told authorities that he and Bott had been traveling from a Denver bar. He said a white vehicle struck the driver’s side of his truck and moved alongside the passenger side as he corrected the truck’s path. Bott then warned that someone had a gun, according to the driver’s account in the affidavit.
Investigators later questioned Steven and Corryn Simpson. Both said they stopped following the pickup after the dispatcher told them to do so and then went home, the affidavits said. Steven Simpson told detectives he did not know that a firearm had been involved.
Authorities obtained a warrant to search the Simpsons’ Highlands Ranch residence. Investigators reported finding multiple firearms, including two SIG Sauer P365 9 mm handguns, a Beretta 92X handgun and a 9 mm rifle.
The search also produced a handgun holster, additional ammunition and a live cartridge described in the affidavit as the same type as the spent cases found at the suspected shooting location. Finding ammunition of the same type does not by itself establish which firearm discharged the cases.
The recovered firearms were test-fired and sent to the Jefferson County Regional Crime Lab for further evaluation. Authorities said the comparison results were pending when the arrest information was released.
Investigators have not reported finding a prior connection between the people in the two vehicles. The evidence described publicly remains subject to review and challenge as the criminal cases proceed.
Steven Simpson was ordered held without bond, while a judge set Corryn Simpson’s bond at $200,000 cash or surety. Both defendants were scheduled to return to court Aug. 5.
Author note: Last updated Aug. 1, 2026.