What Color is Murder?

A famous multimillionaire is killed in front of several hundred spectators. His death seems inevitable – he had managed to make quite a few enemies. If it weren't for one "but" – the victim already knew that someone was preparing... a bullet for him. He was kindly notified about it in a letter.
 
The witness to the crime is a popular coach and human behavior specialist, Alex King. Acting as a consultant to the police, he teams up with Inspector Nina Mander to investigate.
 
The basis of King's method is a very real approach to color-coding human personalities. It is also dedicated to the psychological bestseller by the author of "Surrounded by Idiots," which explains how color coding can accurately read people's thoughts and predict their actions. But will this approach work in the investigation of a high-profile crime? Will the hero be able to determine what color the killer is? Especially since the killer has already marked a new victim.