Here is the latest Iowa news from The Associated Press at 3:35 a.m. CDT

BURLINGTON, Iowa (AP) — Police are investigating the fatal shooting of a 28-year-old man in Burlington, Iowa. Burlington Police Lt. Adam Schaefer says officers were called shortly before 2 a.m. Sunday. They found a 28-year-old man with a gunshot wound when they arrived. The victim was taken to a hospital where he later died.

IOWA CITY, Iowa (AP) — The 14th Iowa City Zombie March takes place Sept. 21 in downtown Iowa City. Zombies will assemble at College Green Park, and assistance with zombie make-up will be available starting at 4 p.m. The march will begin promptly at 5:30 p.m., when participants will shamble through Iowa City, ending with an after-party. Proceeds from the march will go to support programs to feed the hungry, homeless and at-risk.

DES MOINES, Iowa (AP) — Iowa’s attorney general says his office is joining a multistate investigation to determine whether Facebook has violated any antitrust laws. Attorney General Tom Miller says Facebook’s dominance over communications and information is concerning and warrants the investigation he’s leading along with 8 other attorneys general. Miller says the goal is to determine whether Facebook’s actions “may have endangered user data, reduced the quality of consumers’ choices, or stifled competition.”