(KRON) -- The Monterey County District Attorney’s Office announced its conviction of a 42-year-old Salinas Valley State Prison inmate for attempted murder on other prisoners and a correctional officer. 1 dead, 4 hospitalized as another boat capsizes near Bodega Bay The D.A.’s office said Michael Ellison, of Riverside, CA was convicted by a jury of “first-degree murder, first-degree attempted murder of a peace officer, and first-degree attempted murder.” Ellison was also convicted of "three counts of assault by life prisoner." Authorities said Ellison had a string of violent incidents while incarcerated.  The D.A. said Ellison fatally stabbed a fellow inmate on the yard at Salinas Valley State Prison back on April 8, 2018. On July 26, 2019, Ellison, while placed in solitary confinement at the Correctional Training Facility in Soledad, stabbed a correctional officer several times. Officials said almost four years later on Aug. 12, 2023, Ellison stabbed his cellmate. The jury also determined that Ellison has a long-sheet of prior convictions, including “murder out of Riverside County in 2004, assault by a prisoner with a deadly weapon from Kings County in 2005, and assault with a deadly weapon causing great bodily injury from Kern County in 2017." The D.A.’s Office reported Ellison faces a maximum sentence of life without parole and an additional 87 years of life in prison.