Candidates must be under the age of 40 to be accepted into the Police Academy. You must be a U.S. citizen or a legal resident at the time of hire.Duty and length of service in the Armed Forces of the United States. This letter must also include a copy of the applicant's Military ID. 3. It's been a long time since I went through an application process. In my day, it could take a year or more. Goerge Riehm was the first West Chicago Police officer killed in the line of duty. If you are serving or have served in the US armed forces and are interested in becoming a US citizen, you may be eligible to apply for naturalization. Have you ever served active duty in the U.S. Military? Metal detectors and other security devices are in use onboard RTC.