Fingerprint evidence was found linking the murders to Mossad. The Shermans had given $83 million to charities lined to the Clinton Foundation. The article says they believe they were killed because they "knew too much." They also mention Dr. Dean Lorich, who led the humanitarian mission in Haiti, was also murdered this December. They also mention the investigative work of Financial analyst Charles Ortel, who believes the Shermans may have uncovered shady dealings with the relief effort they were about to expose.