An Indianapolis man pleaded guilty to second-degree murder on Tuesday for fatally shooting a USPS mail carrier over his mail not being delivered.

Tony Cushingberry, 23, faces a maximum sentence of life in prison, though a sentencing date is still to be determined, according to the U, S, Attorney’s Office in the Southern District of Indiana.

“We hope that this case’s resolution will serve as a deterrent to those criminal actors who threaten the fundamental right of a safe work environment for our nation’s postal employees,” USPS Inspector-in-Charge Rodney Hopkins said in a Wednesday press release.

Cushingberry shot mail carrier Angela Summers in April 2020 and admitted to the shooting later. The conflict arose after the mail was not delivered to Cushingberry’s home due to an aggressive dog. As a result, Summers walked past the residence without delivering the mail and Cushingberry demanded a delivery while she was at the neighbor's house.

Summers sprayed Cushingberry with mace following the interaction, and he then grabbed a handgun from his waist and shot her in the chest. She instantly collapsed and was later pronounced dead at the hospital, court documents show.

“Letter carrier Summers was a dedicated public servant simply doing her job when she was senselessly murdered,” U.S. Attorney Zachary Myers said in the press release.

"Our office will work with our law enforcement partners to hold criminals accountable for violent attacks on government officials. While no prosecution will bring the victims of gun violence home to their families, we will work tirelessly to protect the public and bring violent criminals to justice," Myers added.