Puddle of Mudd Singer ARRESTED AT 3AM Powder and Pills

2/5/2012 4:30 AM PST

Puddle of Mudd Singer Wes Scantlin ARRESTED -- Powder and Pills

More problems for Puddle of Mudd singer Wes Scantlin ... TMZ has learned the rock star was arrested at 3:00 AM last month ... after cops discovered pills and some suspicious looking powder.

Law enforcement tells TMZ ... the 39-year-old was pulled over in the wee hours of January 12 in Culver City, CA for an unknown traffic violation.

According to our sources, Scantlin showed signs of being intoxicated and a search revealed Scantln to be in possession of a controlled substance -- which we're told was some kind of powder and pills. 

Scantlin was booked for felony possession and released a few hours later after posting $10,000 bail. Attempts to contact Scantlin for comment were unsuccessful.

It's been a rough couple of months for the singer ... he's divorcing his hot wife ... and Uncle Sam is on his ass for falling wayyy behind on his taxes.