Officer Jennifer Sebena, 30, was shot and killed in the pre-dawn hours of December 24, 2012, while on patrol for the Wauwatosa Police Department. Dispatchers lost contact with her around 4:40 a.m.; a fellow officer discovered her in the Wauwatosa Fire Department parking lot, having been shot multiple times. Her death was the first line-of-duty death in the department’s 96-year history.

Investigators focused on her husband, 30-year-old Benjamin Sebena, a U.S. Marine veteran who had served two tours in Iraq and suffered injuries in a mortar attack. Jennifer had told a colleague that Benjamin had been abusive and had once held a gun to her head. Benjamin admitted to stalking her for several days, ambushing her outside the fire station, shooting her twice in the back of the head with his own handgun, then taking her service weapon and firing three more times. He was arrested the same day and charged with first-degree intentional homicide; he later pleaded guilty and received life with eligibility to petition for supervised release after 35 years.

Did anyone who knew Jennifer or her patrol routine before December 24, 2012, notice changes that might help explain how the ambush unfolded?