The First 48 The First 48

School's Out

Sep 17, 2026 · 42m

Summary

This episode of The First 48 investigates the fatal shooting of 20-year-old Zachary Cortez in Mobile, Alabama, which stemmed from a teenage dispute over a stolen gun. Detectives Riley Stewart and Jermaine Rogers uncover that the motive was not a domestic issue but a "beef" between the victim and 18-year-old Margarius Duke, who had his firearm taken by Cortez. Surveillance footage and a recovered 40-caliber pistol lead to the arrests of Duke and his accomplice, Jeffrey Johnson, both of whom plead guilty to manslaughter. The case highlights how a minor conflict escalated into a life-altering …

Topics discussed

Introduction: The loss of Zachary Dobe The 911 call and initial discovery Show intro and case overview: 'Schools Out' Sponsor segments: QVC and Lincoln Tech Detectives arrive at the crime scene Victim profile and witness interviews Ballistics evidence and witness testimony Interviews with surviving friends Interview with the 911 caller and prior threats Interview with the ex-girlfriend Sponsor segments: QVC and Telehealth Interrogation of the ex-girlfriend Identifying suspect Margarius Duke Arrest of Duke and discovery of gun Interrogation of Duke and release on weapons charge Surveillance footage and search of Duke's home Jail interview: Duke names second shooter Investigating the second suspect Jeffrey Johnson Interrogation of Jeffrey Johnson and confession Sentencing, family impact, and 21st birthday Outro and final sponsor segments
Listen ad-free on Castria