Forensic science has been widely used to help police solve complicated murder cases. Here, The Nation helps you explore one of the latest advancements in forensic science – the use of the inverse trigonometric function, arcsin(x), in a blood-trail investigation, which is now being taught at Assumption College as part of math studies.

Before a mob of Trump supporters staged a riot in the U.S. Capitol and thousands of Americans became amateur detectives working to identify the culprits, a loosely connected group of seasoned online sleuths were ringing alarm bells and picking off extremists online, one by one.