Early Sunday morning, firefighter Graham Hoffman, 29, was in the back of an ambulance transporting a patient to the hospital in Kansas City, Missouri, when he was stabbed in the chest, piercing his heart, according to a press release published on the city's website.

A woman in Kansas City, Missouri, has pleaded not guilty in the fatal stabbing of a paramedic as she was being taken to a hospital in an ambulance.

Shanetta Bossell, 38, who is charged in the stabbing death of Kansas City Fire Medic Graham Hoffman, was in jail last week for allegedly biting a police officer.