Citizen and Securitas will test an on-demand private security service in Chicago. The crime alert app and security company may offer a check-in service in which agents could follow up with the victim of a crime to make sure they are ok.

In Los Angeles, the app tested a rapid-response security service with Citizen- branded cars. Security agents responded to calls. The company may have taken a different approach in Chicago because of the slow response time.

Citizen gives push notifications to users based on police reports. It has a $20 per month subscription service that connects users with agents who can direct emergency services to their location and notify contacts if it is not safe for them to call.

The move suggests Citizen is still interested in offering private security despite its questionable history and stating it wouldn't run its own on-demand force. The previous version of the app was removed from the stores by Apple and Google for encouraging vigilantism.

Last year, it was reported that Citizen's CEO offered users a $30,000 bounty for information on an alleged arson suspect, but the app identified the wrong person as the culprit. The man was quickly released by police for lack of evidence. They arrested another suspect in connection with the fires.