The troubles continue for Michael Douglas' son Cameron: He's currently serving a 10-year prison sentence for drug dealing, yet even while on the inside he was busted for doing drugs. He failed a urinalysis earlier this month and was sent to solitary confinement, a source tells the New York Post. It was the second setback this month, after Douglas was earlier injured—possibly as a result of "prison justice" after being labeled a rat. Last year, Douglas' original sentence was doubled after he admitted to having drugs smuggled in. No word on whether his sentence will be increased once again.