In a Chicago P.D. crossover episode "Don't Bury this Case", Severide is accused of a hit-and-run accident, which later turns into vehicular homicide when one of the victims, a child, dies from her injuries. Lindsay and Voight suspect that Severide was set up, while friendships and relationships are put to the test as the detectives and cops are forced to toe a very thin line with their friends at Firehouse 51 as the evidence against Severide mounts. When drug and alcohol abuse from his past comes to light, detectives within Intelligence are skeptical in believing his innocence. He is eventually found to be innocent.
