Nicholas Burkett was the fourth person stabbed in what police believe was a random string of attacks along the mall on Saturday and Sunday.

After two people were killed and two others wounded in downtown Denver, a suspect has been arrested and now faces charges related to the attacks. See a timeline and map of when and where those attacks took place.

Some people who work along the 16th Street Mall are concerned for their safety after a recent stabbing spree where two people died.