In the TV series, a woman named Marian Price is pointed out as guilty of the murder of ten-child mother Jean McConville in Belfast in 1972.
Marian Price has admitted to being a member of the paramilitary Provisional IRA, which fought for Northern Ireland to become part of Ireland. However, she has never been prosecuted for the murder of Jean McConville.
"It is clear that these allegations are not based on any evidence whatsoever," say Price's lawyers in a statement, writes The Guardian.
"Say nothing" is based on author Patrick Radden Keefe's book "Say nothing: a true story of murder and terror in Northern Ireland" and deals with, among other things, the abduction of Jean McConville.
The IRA suspected that she was an informant for the British army and she was taken away from her home in front of her children. McConville's body was not found until more than 30 years later.
It wasn't until after the peace agreement in Northern Ireland in the late 1990s that the IRA acknowledged its involvement in the murder. However, no one has been prosecuted for the crime so far.
Disney+ has so far declined to comment on the lawsuit.
