MESA, AZ – A Mesa community is grappling with the devastating loss of a beloved pizza shop employee after a brutal act of violence shattered his life and those of his loved ones. Deazo Seghi, 31, was shot to death outside his home late last year, leaving family, friends, and coworkers in shock and grief.
Seghi’s life was cut short after he became the target of Tyler Ross McGuire, a manager at the same pizza shop where both men worked. According to court records, McGuire harbored an intense fixation on a female employee at the restaurant and, believing Seghi was interested in her, meticulously plotted the murder over the course of a year.
Authorities reported that in December 2023, Seghi was found inside his vehicle, slumped over the steering wheel, in front of his apartment complex near North Stapley Road and East Brown Road in Mesa. Witnesses observed McGuire approach Seghi’s car and open fire, shooting him multiple times before fleeing the scene.
The impact of Seghi’s death has reverberated throughout the community. Friends and colleagues described him as dedicated and kind, someone who went above and beyond at work and maintained close relationships with those around him. His sudden and violent death left his loved ones reeling, unable to comprehend the senseless loss.
Investigators quickly connected McGuire to the crime, locating him soon after the shooting. Police recovered a handgun and cellphone from McGuire. Ballistic tests later confirmed that the weapon matched the bullets used in Seghi’s killing, solidifying the evidence against him.
In the days following the incident, further disturbing details emerged. McGuire’s mother found a diary in his possession that outlined his intentions and the planning that went into the murder. Entries in the diary revealed a chilling premeditation, describing both the motive and the steps McGuire took in anticipation of the attack.
Throughout the trial, prosecutors described McGuire’s actions as coldly calculated. Evidence presented showed how the fixation escalated from unwanted romantic advances toward the female employee to confrontations with Seghi, and ultimately to a fatal encounter outside Seghi’s home. The victim had not reciprocated any rivalry or escalation, making the attack unprovoked.
A Maricopa County jury deliberated on the case and found McGuire guilty of first-degree murder. The presiding judge sentenced him to life in prison, a term that ensures McGuire will never be eligible for release.
For Seghi’s family, the sentence brings a measure of justice but cannot undo their grievous loss. Those who knew Seghi continue to honor his memory, remembering his warmth and dedication amid the pain of his absence.
The case underscores the devastating effects of unchecked obsession and violence in the workplace, as well as the profound impact such tragedies have on victims and their communities.