Each episode of “One Deadly Mistake” follows a homicide investigation where police work tirelessly against the clock to solve a complex case, until they discover an unlikely piece of evidence that exposes the identity of the killer.
This explosive exposé profiles the sadistic serial killers Dean Corll, aka Candyman, and John Wayne Gacy, aka The Killer Clown, who separately each murdered dozens of young men in Houston and Chicago while going undetected for much of the 1970s.
Two petty thieves struggling to make ends meet are pulled into the criminal underworld, slowly climbing the ranks to become ruthless gang leaders with the power to change history.
Detective Stas Khabarov is shot in the back attempting to arrest a well-known drug dealer. When Stas comes to his senses, he is shocked to realise that he has actually died and become a ghost. He sees a vision of his estranged wife Vera being murdered on her birthday by the same person who attacked him. Determined to find his killer, he decides to stay on Earth to solve the mystery and prevent the death of his beloved wife.
A woman's young son is kidnapped and the only clue to his disappearance is a note starting with the words "This is a quiz." What follows is a fast-paced and stylish whodunnit which leads chief investigator Kaoru Kiriko of the Special Investigation Team down a trail of increasingly perplexing riddles that all the while seem to mock the efforts of the police. Street-smart Kaoru may be the kidnapper's intellectual match, but as she gets closer to her mark, she finds herself becoming the hunted rather than the hunter.
Mai Daqi is a genius in the legal profession, but because of his dissatisfaction with the profitism of the law firm, he shelved his lawyer's license. It wasn't until an air crash that suddenly took the lives of his parents and his fiancee four years ago. In order to get justice for his family, Daqi regained his legal profession and overthrew American Airlines' first-class lawyers.
The First Investigative Division is the star unit of the Tokyo Metropolitan Police Department. Jun'ichi Ōiwa, the head of the division, leads around 400 elite detectives. He has an extremely heavy responsibility: attends initial investigations at the scenes of all brutal crimes that occur within the metropolis, decides on the course of action of the investigations at the same time as he directs many investigation task forces and gets into investigations himself at the critical phase. However, Ōiwa is definitely not a superman. Amid his suffering, Ōiwa overcomes this grave responsibility and is quite simply a "life-size hero" and "ideal boss" to his subordinates.
The official definition of a serial killer is someone who kills three or more people. But do they have more in common than just a statistic? The series looks deeply into contemporary serial killers, to the most meticulous killer of modern times, Sacramento's Dorothea Puente, the owner of the 'House of Horrors'. Then there are the educated killers, like Dr Harold Shipman, who is thought to have killed nearly 300 people who were his patients and Ted Kaczynski, the Unabomber, who held a PhD in Mathematics. At the other end of the scale, Los Angeles serial killer Lonnie Franklin was organised but not smart, his reign of murder led to the deaths of so many disadvantaged women.