A timeline of the investigation of the Gilgo Beach killings

In 2010, police searching for a missing woman began finding human remains in the scrub along a barrier island parkway near New York’s Gilgo Beach. Over the years, investigators used DNA analysis and other clues to identify the victims. Here is a timeline of the investigation that led to the arrest of Rex Heuermann, who pleaded guilty Wednesday to murdering seven women and admitted in court that he killed an eighth.