I'm So Confused

While reviewing a transcript today on an appeal I'm working on, I had a huge question mark form over my head. It was a drug case and the defense lawyer (not me) was asking the jury panel if they would make the State prove its case beyond a reasonable doubt as required by the law. (Pretty much standard stuff). Then one of the potential juror's said: "In my book all people that's on drugs are guilty anyway. That's my thought." Huh?