Calleigh was born in Louisiana. Her mother came from a family with a wealthy name. Her father was a young public defender. Her parents are divorced. The times when her father was not drunk, he would share the wisdom he had with her. She wanted to grow up just like him.
Calleigh is a ballistics specialist. She speaks fluent Spanish and has a degree in physics from Tulane Uni. She doesnt believe in supernatural curses, but she does believe in karma.
Her father is an alcoholic attorney who has tried to rehabilitate himself several times. Calleigh always seems to run off when her father is in trouble, she goes to help him.
She has a brief relationship with John Hagen in season 2; in the season 3 finale, Hagen shoots himself while she is getting a different gun, after having pulled a gun on her earlier in the episode. It has been hinted that romantic interests have sprung up between her and others, including Special Agent Peter Elliot, fellow CSI and best friend Eric Delko and (currently) Homicide Detective Jake Berkeley.
