Reliable international background check company?

I need a trusted international private investigator or background check company to look into a potential business partner who has had employment and businesses in about 10 countries during the past 15 years (Asia, Europe and South America). I'm not talking about a simple criminal record check, but need an... show more I need a trusted international private investigator or background check company to look into a potential business partner who has had employment and businesses in about 10 countries during the past 15 years (Asia, Europe and South America). I'm not talking about a simple criminal record check, but need an extensive background and due diligence investigation done before we do business together. Anyone know a real company that could handle this? Thanks for any info!
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