Criminology and Criminal Profiling for beginners: (crime scene forensics, serial killers and sects)

Nowadays we hear very often about criminology, serial killers and heinous murders. We hear about them on the news, cinema, literature, video games; the serial murderer has now polarized a good part of the media expression. Who has never heard of Dr. Hannibal Lecter, or Dexter Morgan? And who has never seen an episode of CSI? But how much truth is there? How do serial killers act? How do they choose their victims? And why do they kill? Do investigation techniques really work as we see in TV ...