An inquiry found that systemic discrimination interfered with efforts to catch a murderer who targeted gay men, mostly of Middle Eastern or South Asian descent.
“Last Call,” by Elon Green, retraces the murders of four men by a serial killer in the 1990s, at a time when gay men felt pressured to hide their sexuality and were often the victims of homophobia.
Takahiro Shiraishi confessed to killing eight women he stalked on social media, and a man he thought suspected him, in crimes that evoked many of the country’s social fears.
At least 50 of those murders were verified by law enforcement officers, according to the F.B.I., which declared Mr. Little the “most prolific” serial killer in U.S. history.
Yoon Sung-yeo was sentenced to life for a crime he did not commit in South Korea. He was able to clear his name after a notorious serial killer confessed last year.
The code had long baffled cryptographers, law enforcement agents and armchair sleuths obsessed with the shadowy killer, who was blamed for five murders in the late 1960s.
In this Alex Gibney documentary, the psychiatrist Dr. Dorothy Otnow Lewis, who has spent decades studying the pathology of violence, explains what makes people murder.
In 1983, Britain was gripped by the case of Dennis Nilsen, who admitted to at least 12 murders. This fall, the country has been transfixed by Tennant’s performance as Nilsen in the mini-series “Des.”