Two school custodians were found shot and killed on Monday inside Mark Twain Elementary School in Chicago, according to the Chicago Police Department. Authorities discovered two unresponsive adults in the afternoon, each with a single gunshot wound to the head. Both victims, a 48-year-old female and a 63-year-old male, were transported to Christ Hospital in critical condition and later pronounced dead. A weapon was recovered at the scene. Police stated that no students were present in the building at the time of the incident. The investigation into the deaths is ongoing.