PEOPLE has not been able to reach the Gilbert family for comment. But soon after Mari ... s Daughter, 6 — Then Left Her Body in a Bucket for the Girl’s Mom to Find Father of 18-Year-Old ...

After Mari Gilbert pushed authorities to investigate the disappearance of her daughter Shannan Gilbert in 2010, the search led officials to the bodies of several homicide victims in Long Island.

It was Gilbert's mother, Mari Gilbert, whose fighting for justice for her daughter's case never relented and eventually pushed law enforcement to make a move. This show is more about her fight ...