Authorities combined license-plate data, 911 audio, witness accounts and search-warrant evidence after Andrew Luke Bott was fatally shot.
GOLDEN, Colo. — A network of license-plate cameras and other electronic records helped Jefferson County investigators reconstruct the movements of two vehicles after a traffic collision ended with a passenger fatally shot and a married couple facing murder-related charges.
Authorities say 23-year-old Andrew Luke Bott was riding in a Ford F-150 on July 25 when a driving confrontation involving a white BMW X5 developed into a pursuit through the Grant Ranch area. Steven Cole Simpson, 25, who police identified as the BMW’s driver, now faces first-degree murder after deliberation and attempted first-degree murder after deliberation. His wife, 26-year-old Corryn Simpson, who authorities say was in the passenger seat, is charged as an accessory to first-degree murder. The investigation illustrates how detectives say they built a timeline from separate forms of evidence rather than relying on a single witness account. Both defendants are presumed innocent.
The camera evidence became significant because investigators had competing pieces of information to test after the shooting. The Jefferson County Sheriff’s Office said Flock Safety license-plate readers captured the BMW and the Ford entering and leaving the Grant Ranch neighborhood within seconds of each other. Detectives also reviewed other surveillance footage. Those records allowed investigators to trace vehicles associated with the case through the area where the shots were reported and to compare the images and times against 911 calls. Authorities have not released every image or the complete camera sequence, but prosecutors have cited that material as part of the evidence used to identify the Simpsons.
Before detectives began that reconstruction, the night had started with what authorities describe as a traffic collision. Investigators say the Ford was traveling on South Santa Fe Drive near West Belleview Avenue and Arapahoe Community College when it became involved in a crash that affected the Simpsons’ BMW. Reports based on the arrest affidavit describe the pickup as striking another vehicle, which then made contact with the BMW. The Ford continued west toward Bowles Avenue. Corryn Simpson called police at about 10:28 p.m. to report what she described as a hit-and-run. The BMW followed the pickup while the call remained active.
That call supplied a second stream of evidence that could be synchronized with the cameras. Corryn Simpson gave the dispatcher the Ford’s license plate number while the two vehicles continued west and later entered the Grant Ranch area, according to prosecutors. Dispatchers told the occupants of the BMW to stop following the truck. Authorities allege the BMW did not break off the pursuit. The sheriff’s office said Steven Simpson can be heard making a threatening statement during the recorded call. A short time later, two gunshots are audible. Investigators later alleged that Simpson fired multiple rounds toward the occupied Ford. The recording is evidence cited by authorities; the allegations have not yet been proved at trial.
A separate emergency call marked the other end of the investigators’ timeline. At about 10:32 p.m., deputies were sent toward West Dorado Avenue and Grant Ranch Boulevard after a 911 hang-up. Dispatchers called the number back and reached the Ford’s driver. He reported that another vehicle had been chasing the pickup, shots had been fired and his passenger had been hit. Police directed him to the parking lot at Columbine High School. Deputies met the Ford there and gave Bott emergency aid before he was taken to Littleton Adventist Hospital. Authorities said Bott had suffered a gunshot wound to the head and died from the injury.
The Ford’s driver then became a key witness to the investigation. According to the arrest affidavit, he told detectives that he and Bott had been returning from a Denver bar when the encounter unfolded. He described the white SUV coming alongside the pickup and said Bott warned that the other vehicle’s occupant had a gun before shots were heard. Investigators later recovered two spent 9 mm casings from an intersection associated with the shooting. The witness account gave detectives a description of the final moments from inside the Ford, while the earlier emergency call offered a separate recording from inside the BMW. Investigators could then compare those accounts with the vehicles’ recorded locations.
Police also questioned the Simpsons after identifying them. According to the arrest affidavits reported by local news organizations, Steven and Corryn Simpson said they stopped following the Ford after receiving the dispatcher’s instruction and went home. Steven Simpson also reportedly denied knowing that a gun had been involved. Detectives, however, had collected camera information they said placed the two vehicles near one another after the point when authorities allege the chase should have ended. That apparent difference between the statements and the electronic timeline became another part of the probable-cause case police presented when seeking further warrants.
Those warrants expanded the investigation from digital evidence to physical evidence. Searches of the Simpsons’ Highlands Ranch residence and BMW produced multiple firearms, ammunition and other items, according to the district attorney’s office. Prosecutors said three 9 mm handguns were seized. More detailed reporting based on the affidavit identified two SIG Sauer P365 pistols, a Beretta 92X and a 9 mm rifle at the residence, along with a holster and ammunition. One live cartridge was described in the affidavit as the same type as casings found at the scene. Investigators also collected projectiles, gunshot-residue samples and other evidence for testing.
The distinction between ammunition consistency and a completed forensic match remains important. Prosecutors said ammunition recovered during the searches was consistent with shell casings from the shooting scene, but early reports said firearms and related evidence had been submitted to a crime laboratory for further examination. CBS Colorado reported that weapons were test-fired and sent for evaluation and that results were pending at the time. The public reports reviewed do not establish that laboratory testing identified one specific recovered firearm as the weapon that fired the fatal shot. Such testing, if completed and introduced in court, could become one part of a broader evidentiary record.
The investigation also relied on the absence of an apparent earlier connection between the people involved. Jefferson County sheriff’s spokeswoman Jacki Kelley told Colorado Public Radio that she believed the occupants of the vehicles had no prior relationship. That assessment supports investigators’ characterization of the case as emerging from the driving encounter rather than from an earlier dispute between Bott and the Simpsons. It does not determine what happened during the pursuit. Prosecutors still must prove the elements of each criminal charge, while defense lawyers may challenge the interpretation, reliability or admissibility of any evidence presented.
Prosecutors filed formal charges Aug. 5. Steven Simpson’s first-degree murder count alleges an intentional killing after deliberation, while the attempted first-degree murder charge relates to the alleged shooting toward another occupied vehicle. Corryn Simpson is not charged as the shooter. Her Class 4 felony accessory charge is legally distinct from the Class 1 murder accusation filed against her husband and requires prosecutors to establish the conduct alleged against her. Authorities have released separate case numbers for the defendants, reflecting the fact that the state must prove each case independently.
The pair were arrested July 29, four days after Bott was shot. The district attorney’s office later scheduled a Sept. 2 preliminary hearing for both defendants. The official and established news sources reviewed for this report did not provide a later public account of that hearing or a completed forensic report. The publicly documented case therefore remains centered on the reconstruction investigators described in August: cameras placing two vehicles along the same route, two emergency calls made minutes apart, statements gathered afterward and physical evidence seized after detectives obtained court-authorized warrants.
Author note: Last updated September 21, 2026.