Good evening. I joined the police force in 2002 and when I arrested someone, they were brought to the custody suite and processed. They were then interviewed then I'd start to build the case. If there was sufficient evidence, the prisoner would be charged. A court date would be arranged then the prisoner would be finger printed, photographed and DNA taken. Then they were either bailed to court or kept in the cell.
This changed shortly afterwards. Probably 2004 ish, when I arrested someone, they were processed in the custody suite as normal, but their finger prints, photo and DNA were taken prior to interview (unless it was a traffic matter). Now I didn't like or agree with this approach. The reason being is that potentially you can be completely innocent when arrested, like when someone makes a malicious allegation. Your DNA and prints are on record, even though you haven't been charged with any crime.
This is the UK, but what is the process in the US? And while we're here, any other countries?