|Affiliation||Chicago Police Department|
|Family|| William Halstead (brother)|
Pat Halstead (father)
|Actor||Jesse Lee Soffer|
|First Appearance||"Chicago Crossover" (on Law & Order: Special Victims Unit)|
Jay Halstead is a detective assigned to the Intelligence Section of the Chicago Police Department under Sergeant Hank Voight. His investigations sometimes overlay with those of Manhattan Special Victims Unit.