|Minor Character: Miami|
|Family|| Unnamed ex-wife|
Calleigh Duquesne (daughter)
Austin North (adopted grandson)
Patty North (adopted granddaughter)
|Portrayed By||John Heard|
|First Appearance||Double Cap|
Kenwall "Duke" Duquesne is a lawyer and the father to CSI Calleigh Duquesne.
He has a drinking problem which has brought him into conflict with Calleigh and the CSI on a few occasions.
In this episode viewers are introduced to Mr. Duquesne for the first time. Calleigh confronts her dad about his drinking problem after she's called away from work to drag him out of a bar
Mr. Duquesne announces he is now a public defender and needs her help with a murder case in which a woman stabbed her boyfriend to death in his car with a screwdriver.
Mr. Duquesne came to his daughter, Calleigh, for assistance upon finding evidence that he may have been involved in a hit and run while under the influence. Newly hired CSI Ryan Wolfe found evidence of a carjacking and proves Duquesne's innocence.
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