A private investigator says Hunter Biden tried to conceal his whereabouts by using the identity of his dead brother Beau.<br />Hunter is in the middle of bitter paternity case.<br />Dominic Casey is the PI on the case.<br />He says stolen identities were used to check Biden into an Arizona rehabilitation facility.<br />The identities were reportedly found by police after responding to reports of suspicious items inside a car.<br />Biden had issues drugs, including reports of cocaine-laced cigarettes, crack, strippers, sex toy addiction, and vodka binges.