LiLo's Bad Influence Keeps Quiet

2/15/2008 11:20 AM PST BY TMZ STAFF
TMZ tried to get Lindsay Lohan hanger-on Patrick Aufdenkamp to talk about being an allegedly negative force in the rehabbed starlet's entourage -- and can you believe it? -- he didn't say a word!

Sources close to Lindsay's family tell TMZ he's been jeopardizing Lilo's sobriety. To his credit, TMZ didn't see her with him at Goa last night.