People can apply to have their DNA samples expunged if either: The criminal case they provided the sample for ended in a dismissal, an acquittal, or a non-felony conviction; or They provided the sample for a case that resulted in no charges being filed or in no felony charges being filed within 90 days of the arrest. To expunge DNA samples, arrestees must fill out the Request for Expungement of Arrestee DNA Sample from the Colorado Bureau of Investigation's website. The arrestee must then mail the form to: Colorado Bureau of Investigation, 690 Kipling St., Ste. 3000, Lakewood, CO  80215. The CBI will then contact the arrestee when the sample has been expunged. Note that anyone arrested for a felony in Colorado must submit a DNA sample.