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Photos: Denver PD, GoFundMe

Denver police have charged a woman with fatally shooting a fellow postal worker during an argument near her home.

Jenny Nguyen, 27, was charged with first-degree murder in the shooting death of Jamal Zachary Thompson, 26.

Police responded to calls of shots fired and a vehicle crash at the intersection of 54th Avenue and Yampa Street at 12:10 a.m. Saturday.

Thompson was found by police in a wrecked Ford Fusion that had rolled into a field. He was deceased with a gunshot wound to the neck and "had been thrown about the interior of the vehicle," according to a police report obtained by CBS4.

Police found Nguyen's driver's license on the passenger seat of the car. Officers recovered 9mm shell casings on 54th Avenue. A homeowner there told police an angry Asian-American woman was driving the car a half hour earlier.

The man identified Nguyen as the angry female driver after police showed him the driver's license.

Thompson's mother told police her son and Nguyen had been in an on-again, off-again relationship.

Nguyen and Thompson were both employed by the US Postal Service but they worked at different locations, according to CBS4.

Police executed a search warrant at Nguyen's residence on Saturday morning near 54th and Tower Road.

Investigators recovered a disassembled 9mm handgun in a bedroom heater vent. The gun's barrel was missing. Recordings from the home's video surveillance camera had been deleted.

Thompson leaves behind a 4-year-old son. A GoFundMe account raised over $4,000 to help pay Thompson's funeral expenses.

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Photos: Facebook, Indianapolis PD

Authorities arrested a man in the shooting death of a postal worker who was gunned down while delivering mail in Indianapolis.

Police and federal agents arrested Tony Cushingberry on Wednesday in connection with the shooting death of Angela Summers, the US Postal Service said in a statement.

Cushingberry, 21, allegedly shot Summers, 45, as she delivered mail on Monday afternoon near his home on North Denny Street, according to

Alondra Salazar, 19, was sleeping in her home on North Denny Street when she heard a loud bang. She said she looked through her peephole and didn't see anything. When she opened the door, she found Summers slumped on the porch, suffering from a gunshot wound.

There was blood and undelivered mail beside her, along with a small bottle of hand sanitizer and a can of pepper spray, Salazar said. There was a bullet hole in her door.

Salazar said she held Summers's hand and comforted her as they waited for paramedics.

"She couldn't speak, she was hyperventilating," Salazar said. "I think she said something about her kid and that's when I started crying."

Paul Toms, head of a letter carriers union, said Summers complained about aggressive dogs at a residence on North Denny Street. He said the shooting took place at a residence where Summers had issues with dogs.

Summers wrote a Facebook post complaining about a chihuahua barking at her two days before her death.

"This dog is a nasty devil that I've actually had to spray -- twice!"

Toms said there were several complaints made about the dog that resulted in dog warning notices sent to the home. A third dog warning typically means suspension of mail delivery service to the home, Toms said.

Summers wrote that the family threatened her when the post office stopped delivering their mail due to the dog complaints.

Summers wrote that she felt "seriously unsafe" after the threats.

FYI: This post was updated to reflect the fact that the "aggressive" dog was in fact a chihuahua.