In case of an emergency requring police, fire, or medical assistance, dial 911 for help.The Des Moines Police is the local law enforcement agency. Each suburb also has its own police department, such as the Windsor Heights Police Department.
Des Moines is an extremely safe city during all parts of the day. One can take the evening air without feeling nervous. Just like in all other cities with a sizable amount of people, there are areas and neighborhoods that may be more troublesome for some groups of people than others. Visitors are likely to avoid these small pockets, however.
Pickpockets and grand ripoff schemes that plague other cities in the U.S. and across the globe are not pervasive in the area. Still, the best thing to do is use your judgment--if you don't want attention, don't do things to draw people's attention.