(CNN) VIENNA - Ghanem, who served under Moammar Gadhafi, defected as the opposition movement and NATO closed in around the then-Libyan leader.

His body, dressed in normal clothes, was found floating in the river, said Vienna police spokesman Roman Hahslinger. According to his daughter, Ghanem left the family residence early Sunday morning, the spokesman said.

He added that officials are waiting on autopsy results to determine a cause of death, but that Ghanem died in a "normal" manner. Police do not suspect violence was involved, Hahslinger said.

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