A jury earlier this month found the supervisor guilty of first-degree murder, concluding the killing was premeditated and driven by obsession rather than any immediate provocation. Obsession at Work Escalated Over TimeProsecutors told the court the defendant, Tyler Ross McGuire, managed a local pizza shop where both the victim and a female employee worked. Despite this, the supervisor grew increasingly jealous and convinced himself that Seghi was also attempting to pursue a relationship with her. Another entry revealed his fixation on the female co-worker, stating: 'If I had my way, I'd be with her. Court documents show the defendant had purchased a firearm and searched for the victim's home address prior to the shooting.