The trial for Scott Ostrem, who i charged with six counts of first-degree murder, is scheduled to begin Jan. 28.
The killing of Richard Black is the fourth police shooting in the city of Aurora in about a month.
Scott Ostrem is charged with killing three people in a Walmart on Nov. 1, 2017.
Colorado doctors and advocates for gun safety are promoting a program they say is designed to protect children from firearms.
Police spokesman Sonny Jackson says preliminary information points to a conflict between the driver and passenger.
Many argue that the bar for Colorado's "imminent danger" statute is simply too high and that state needs a red flag law to lower that bar.
There have been 27 killings so far this year, but Denver remains much safer than other cities.
Democratic State Rep. Alec Garnett’s bill allows a judge to keep firearms out of the hands of people who may be a risk to themselves or others.
The Thursday night “Vote For Our Lives” rally was held at Clement Park in Littleton, just across the street from Columbine High School.