Jules and Erin had a close friendship, mainly due to the fact that they were the only female detectives in the Intelligence Unit.
Outside of work, Jules was a loving and devoted wife and mother of two. While her job was demanding she always made time for her family, and didn't bring work home with her.
Death of Julie Willhite
In reference to the episode: "Stepping Stone".
As they turned around one of Pulpo's men shot through the door, the shot bypassing the kevlar vest and fatally hitting Jules in the neck. Detective Lindsay accompanied Willhite in the ambulance to the hospital, but she died later in the day. Lindsay went to inform her family, who burst into tears once they'd heard. They later had a ceremony remembering Jules, and her husband removed the sticker, showing her name on the stone of the fallen.