An accusation of sexual assault led to a fatal shooting in Palmer, local police said, with an Anchorage man taken into custody at the scene.

Duyvu V. Nguyen, 40, is charged with first-degree murder in the death of 32-year-old Palmer resident Tuan Q. Nguyen, according to a statement from Palmer Police Chief Lance Ketterling. Officers responded to a home off Daron Drive just before 10 a.m. Monday in response to a 911 call reporting the homicide, where they found Tuan dead.

“Duyvu Nguyen told police he killed Tuan Nguyen because Tuan allegedly sexually assaulted Duyvu’s wife,” Ketterling wrote. “That allegation is currently uncorroborated.”

A criminal complaint against Duyvu Nguyen, written by police Cmdr. Dwayne Shelton, said the suspect was found on the porch of Tuan Nguyen’s apartment building next to a .45-caliber handgun. He told police his wife had been assaulted by the victim “at an earlier date.”

“(Duyvu) drove from their residence in Anchorage to Tuan Nguyen’s residence in Palmer and shot him,” Shelton wrote.

Police found Tuan Nguyen shot in the head twice, with a .45-caliber casing on the floor nearby.

Ketterling said Duyvu Nguyen had no apparent family relationship with the victim; police are still investigating his claim regarding the assault against his wife.

“We are in the process of trying to speak with her right now,” Ketterling said. “She did not want to speak with us without contacting an attorney first.”

Duyvu Nguyen was being held without bail at the Mat-Su Pretrial Facility, according to Ketterling.

Daniella Rivera contributed information to this story.