Sherry Johnston, mother of Levi Johnston who got Bristol Palin knocked up, was served with a search warrant and arrested shortly thereafter by the Alaska State Police and then charged with second-degree misconduct involving a controlled substance – typically manufacturing or delivering drugs.

Police also charged her with fourth-degree misconduct involving controlled substances, or possession. An undercover narcotics investigation focusing on Sherry Johnston had been going on “a while” prior to the search and her arrest.

A rep for Alaska Gov. Sarah Palin, mother of Bristol Palin, said Thursday:

“This is not a state government matter. Therefore the governor’s communications staff will not be providing comment or scheduling interview opportunities.”

Bristol Palin’s due date is today. She and Levi are both 18, and are engaged.

[imagse: thehollywoodgossip and WENN]