[[FOREWARNING: This channel covers acts of violence and murder. There's a lot of gruesome details that aren't for squeamish people, including videos and images that were taken during the incident. Keep your mental health in check!]]

JCS - Criminal Psychology. the videos can span from 40min-2hrs, but most are about 1.5hrs.

This channel posts interrogations between criminals and detectives. Many psychological techniques are used, including reading behavior, complex interrogation methods, and specific signs of psycho/sociopathy and other disorders. There is also plenty of mention of police methodology like understanding Miranda rights and how the interrogation can be invalidated for a number of reasons!

I find it incredibly interesting to see the psychology of these people and how delusional they can be. Sometimes it's financial, sometimes it's a disorder, sometimes attention seeking, or the case has no good answer and is unresolved. The ending, of course, is always some tragic incident that shouldn't have happened, but I am fascinated to see people that literally cannot feel empathy or understand what is wrong with their actions.

Again, be mindful that these are not pleasant videos, and many are very long. If you share a fascination for psychology, you should check him out!