Tyler Ross McGuire, 31, received a life sentence without parole in Maricopa County, Arizona, for first-degree murder in the 2023 killing of his coworker Deazo Seghi, motivated by jealousy over a female employee at their Mesa pizza shop.​
Motive and Escalation
McGuire became fixated on a woman he supervised, confessed his crush, but was rejected; he then physically confronted Seghi, believing he pursued her too. Over the next year, McGuire’s anger grew—he bought a gun, searched Seghi’s address, and planned the murder, as detailed in his diary with entries like “I decided a while ago I needed to kill someone. This person hurt me.”
Murder Details
On December 11, 2023, witnesses saw McGuire approach Seghi’s vehicle outside an apartment complex near North Stapley Road and East Brown Road, shooting him multiple times in the chest before fleeing. Police quickly arrested him nearby with a matching black handgun and cellphone; bullet casings confirmed the link.
Sentencing Impact
A jury convicted McGuire earlier this month, leading to his natural life term; his mother turned over the incriminating diary days after arrest. Maricopa County Attorney Rachel Mitchell emphasized the premeditated, unprovoked act and its lasting family toll.
