Jurors rejected Michael Lanunziata’s self-defense claim in the death of Joseph Lephiew.

PHOENIX, Ariz. — An Arizona man who said he acted in self-defense when he shot his roommate in a west Phoenix transitional home has been sentenced to 20 years in prison after a jury convicted him of second-degree murder.

Michael Lanunziata, 38, was sentenced May 4 for killing Joseph Lephiew during a Jan. 25, 2024, confrontation near 42nd Drive and McDowell Road, according to the Maricopa County Attorney’s Office. The sentence closed a case that centered on what happened inside a shared residence where five adult men were living and where prosecutors said a private argument became a fatal shooting.

County Attorney Rachel Mitchell said the evidence did not support Lanunziata’s account that Lephiew attacked him. Police were called to the home after multiple 911 calls reported gunfire. By the time officers reached the residence, Lanunziata had left through a second-story window and moved onto the roof. He spoke with first responders from there for several minutes, telling them there was only one gun in the house and that it was his. Inside, officers found Lephiew lying on the staircase with gunshot wounds. “This was not self-defense, it was a deadly and unjustified act of violence inside a place where people should have felt safe,” Mitchell said after sentencing.

Investigators found Lanunziata’s handgun at the top of the staircase, along with shell casings. Prosecutors said Lephiew was unarmed and that officers found no weapon near his body. Other residents reported hearing an argument before the gunfire. The county attorney’s office said the physical evidence confirmed the shooting took place on the staircase, not in a way that matched Lanunziata’s claim that Lephiew “came at him.” Prosecutors also pointed to what they described as shifting statements by Lanunziata after the shooting. Mitchell said he “manufactured a reality to fit his claim,” a phrase prosecutors used to explain why they believed the self-defense account fell apart at trial.

The case drew wider attention because Lanunziata had made a similar claim after a fatal shooting years earlier in Nevada. In 2016, he was arrested in Henderson after Lamar Reid Jr., 22, was shot and killed at a townhouse near East Paradise Hills and Interstate 515. Reid was reported locally as a relative of former U.S. Sen. Harry Reid. Lanunziata also claimed self-defense in that case. Clark County District Attorney Steve Wolfson later said the physical evidence did not show murder and that prosecutors did not believe they could prove the case beyond a reasonable doubt. Charges were dropped, leaving the Nevada case without a conviction.

The Arizona prosecution ended differently. Lanunziata was charged with one count of second-degree murder, listed by prosecutors as a class one dangerous felony. A Maricopa County jury found him guilty before the 20-year prison term was imposed. The county attorney’s office said the verdict showed that jurors accepted the state’s account of the staircase shooting, including the lack of a weapon near Lephiew and the statements from other residents who heard the argument. The office did not report any pending additional charges tied to the Phoenix case. State prison records cited in local reporting showed Lanunziata was transferred to prison May 5 and projected for release in 2041.

For prosecutors, the home’s purpose became part of the case’s public meaning. The residence was described as a transitional living environment, not a place where residents expected violence from another man in the home. Mitchell said Lanunziata “chose to bring a gun into that home, escalate a conflict, and take a life.” The line placed the focus on the setting as well as the shooting. Lephiew and Lanunziata had lived together for about one year before the killing, according to the county attorney’s office. Officials did not describe the full history of their conflict, and the exact cause of the argument before the gunfire was not made public in the sentencing release.

The earlier Nevada case remained a stark point of contrast. A witness, Leah Hernandez, told a Las Vegas television station in 2016 that she saw Lanunziata shoot Reid and was shocked when the case was dropped. Wolfson, the district attorney, said at the time that prosecutors had an obligation to file only cases they could prove. He cited crime scene evidence, including a knife found under Reid’s body, as consistent with Lanunziata’s self-defense claim. That decision did not legally decide the Phoenix case. It did, however, make the Arizona sentence notable because a second fatal shooting involving a housemate ended with a conviction rather than a dismissal.

Lanunziata’s 20-year sentence now stands as the final judgment in the Maricopa County case unless an appeal changes the outcome. Prosecutors have not announced any further proceedings, and the public record places the case in the post-sentencing stage.

Author note: Last updated May 25, 2026.