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 Missouri woman, Shanetta Bossell, who is accused of allegedly fatally stabbing a Kansas City firefighter paramedic, Graham Hoffman, when he was attending to her injuries, has been charged with first-degree murder.

The emergency worker in Kansas City, Mo., was stabbed in his chest while transporting a patient in what started as a routine call on Sunday, officials said.