MARTINEZ — A man was convicted of murdering his girlfriend and wounding her husband in an Antioch shooting motivated by the suspect and victim’s fractured relationship.
Brian Yacopetti, 48, was convicted of first-degree murder and assault, as well as gun possession, in the May 25, 2023 shooting death of 39-year-old Jennifer Dallmann. Witnesses told police that Yacopetti and Dallmann had dated, with the blessing of Dallmann’s husband, but that their relationship disintegrated shortly before the murder.
The shooting occurred on the 4400 block of Delta Fair Boulevard in Antioch.
Yacopetti’s attorney, Anthony Ashe, argued that Yacopetti was high on marijuana and drunk, and under extreme stress after Dallmann yelled “I hate you” during their breakup that day. It all added up to a killing in the “heat of passion,” he argued. If jurors agreed, that would have made Yacopetti eligible for a conviction of manslaughter instead of murder.
For Yacopetti, the conviction means a return to prison. He was last incarcerated less than a year before the murder, for an aggravated assault conviction, and paroled to his father’s home in Bakersfield in September 2022 before coming to the Bay Area.
Yacopetti’s Facebook page, last updated just four days before the murder, appears to celebrate his release from prison. His introduction says simply, “I’m free, b—-.”
He faces 25 years to life on the first-degree murder charge alone.