Rex Heuermann, 59, has been arrested and charged with six counts of murder in the Gilgo Beach case, which has been a source of mystery since 2010. Investigators are searching Heuermann's home for any potential evidence, and Dr. Johanna Ellerup, Heuermann's sister-in-law, expressed shock and disbelief at the news. The investigation is ongoing, and it is unclear what evidence will be found.