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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.