A Chicago Police Department officer watches as an evidence technician examines a gun at the scene of a fatal shooting in April. Credit: Joshua Lott/Getty Images

Welcome to the Reader‘s morning briefing for Tuesday, May 24, 2016.

  • Weather: Another warm day, but with a possible thunderstorm

A high of 80 and a low of 64 are expected Tuesday. The only downside to the otherwise lovely day is a possible afternoon and/or evening thunderstorm. [AccuWeather]

  • Computer algorithm helps police predict who will be shot and who will be a shooter

For about three years, the Chicago Police Department has been using an algorithm to predict which Chicagoans are likely to be shot and which residents are likely to shoot someone. The program assigns scores based on variables including “arrests, shootings and affiliations with gang members.” Officials hope that the predictive system will help put a stop to gang violence. [New York Times]

  • Outspoken (and ousted) Emanuel critic LaRaviere keeps 2019 mayoral run open

Newly elected Chicago Principal and Administrators Association president Troy LaRaviere isn’t ruling out a mayoral run against Rahm Emanuel in 2019. Asked by WLS AM’s Bill Cameron about a possible run, LaRaviere said it’s on the table now but he doesn’t know what the future holds. The former Blaine Elementary School principal, who was removed by CPS in April for alleged “insubordination,” has been an outspoken Rahm critic for years.  [Tribune]

  • Man fights back after getting stabbed on Loop bridge Sunday evening

A man assaulted at knifepoint on the Washington Street Bridge late Sunday evening managed to subdue his assailant until police arrived. Authorities arrested the attacker, who’d tried to rob the 49-year-old victim before stabbing him twice in the stomach. [ABC 7 Chicago]

  • Another Drew Peterson trial starts downstate

Convicted murderer Drew Peterson is again back on trial, this time for allegedly plotting to kill Will County state’s attorney James Glasgow. According to Randolph County prosecutors, Peterson believed that his murder conviction for the death of his ex-wife Kathleen Savio would be overturned after Glasgow’s death, which he called the “best Christmas present” imaginable. (The trial is being held in Randolph County because of its proximity to Menard Correctional Center, Peterson’s home for more than three years.) [Sun-Times]

  • Chicago Fire Department is prepared for Ebola with new ambulance

Nearly two years after the Ebola crisis swept Liberia and other countries in West Africa, the Chicago Fire Department is showing off a new ambulance equipped to deal with infectious-disease outbreaks. The city will have three vehicles equipped with a special air-filtration system and a pressurized plastic tent ready to go in case of a renewed occurrence. [Sun-Times]