When does The Staircase return?

The Staircase is an American biographical crime drama television miniseries. It is based on the 2004 true crime docuseries of the same name created by Jean-Xavier de Lestrade. The series stars Colin Firth as Michael Peterson, a writer convicted of murdering his wife Kathleen.
Michael Peterson, a crime novelist, is accused of killing his wife Kathleen after she is found dead at the bottom of a staircase in their home. The family is thrown into a tumultuous legal battle as the investigation continues. Meanwhile, a French documentary team takes an interest in the story.