RALEIGH (WTVD) -- New details have been revealed in the sex slave case being investigated by Zebulon police.
A search warrant claims investigators have located more possible victims.
The search warrant is for a safe deposit that belongs to the suspect Robert Whiteside.
According to a confidential police source, Whiteside kept documents of his travels in the safe deposit box.
It was in early June that Whiteside was arrested at a Zebulon warehouse where he both worked and lived.
Police say with him was a woman - a woman he is now accused of luring to Wake County from her home in Germany and keeping her as a sex slave.
In the search warrant application investigators claim that since the arrest of the 45-year-old they have "been able to locate several other possible victims".
Police also say they have more source information that Whiteside had given power of attorney to a man who bank employees say had recently tried to get into the safe deposit box.
He was turned away because bank workers were apparently skeptical of the power of attorney documents.
Although they were hoping to find photos and travel documents, it appears all police found during the search of the safe deposit box were auto and boat registrations.
They also confiscated what was listed as "3 envelopes of bulk." Zebulon police say those envelopes contained $20,000 in cash, which has now been converted to a cashier's check made out to U.S. Customs, which is assisting in the investigation.