File photo shows Philip Marshall (C) with his children Alex (R) and Macaila Marshall.
Wayne Madsen said in a show organized by Kevin Barrett, a founder of The Muslim-Jewish-Christian Alliance, that he had reached the conclusion after a weeklong investigation.
Marshall was afraid of being silenced for his revelations about 9/11, Madsen said, noting that a side door the investigator never used was wide open when his dead body was found.
Along with Marshall, 14-year-old Micalia and her 17-year-old brother Alex were also found dead.
Madsen suggested that Marshall, who had observed many covert operations, had decided to shed light on mysterious issues in the last years of his life.
Marshall believed the former US President George Bush had pulled off the 9/11 attack to foment a government coup. In his fourth book, he was supposed to disclose blockbuster information.
According to Madsen, the crime scene was cleaned up by professionals, and there was also “an SUV, license plate undetermined, with an array of communication antennas bristling from the roof” outside the building.
In a recent interview with Press TV, Barrett said, “Of course, here in the US, where national security community we’re talking about could be both Israel and the US because essentially the US community has been taken over by the Israeli community since 9/11.”
“It seems that Philip Marshall had gotten his hands on some kind of explosive information as he [Madsen] put it. And, he was planning to publish this in his next book,” he added.