I applied online. The process took 1 day. I interviewed at Metro Public Safety and Investigations (New York, NY) in Dec 2018
Interview
You'll first receive a phone call asking you to come into the office. You'll interview with the Chief, Jason. You'll be asked basic questions, qualifications, etc. You'll talk for about 10-15 minutes, and be hired almost always on the spot. You'll be in the field with no training in about 3 days.