If your query refers to a different specific project, you may be thinking of these other major true crime releases from 2022 with similar names:

: While a fictional crime drama, this Australian series was inspired by real-life cold cases and follows a detective investigating the murder of a high school student 25 years later.

: It details the massive exhumation project—one of the largest in criminal history—where hundreds of bodies were tested for drug residues years after their deaths.

: A primary focus is how Högel was able to continue his killing spree for years despite suspicious spikes in death rates and resuscitation attempts during his shifts.

: Högel injected patients with cardiovascular drugs to induce cardiac arrest or other life-threatening emergencies.

: A series on Oxygen that highlights women who killed their husbands or lovers for financial gain.

More information. The Dark Shadow of Murder premiered on BBC Scotland on 1 September 2020. Screen Scotland Black Snow (TV Series 2022– ) - IMDb