Michigan § 750.360a - Electronic or magnetic theft detection; shielding merchandise prohibited; violation as crime.

A person shall not do any of the following:

Possess a laminated or coated bag or device that is intended to shield merchandise from detection by an electronic or magnetic theft detection device with the intent to commit or attempt to commit larceny.

Manufacture, sell, offer for sale, or distribute, or attempt to manufacture, sell, offer for sale, or distribute, a laminated or coated bag or device that is intended to shield merchandise from detection by an electronic or magnetic theft detection device knowing or reasonably believing that the bag or device will be used to commit or attempt to commit larceny.

Possess a tool or device designed to allow the deactivation or removal of a theft detection device from any merchandise with the intent to use the tool or device to deactivate a theft detection device on, or to remove a theft detection device from, any merchandise without the permission of the merchant or person owning or lawfully holding that merchandise with the intent to commit or attempt to commit larceny.

Manufacture, sell, offer for sale, or distribute a tool or device designed to allow the deactivation or removal of a theft detection device from any merchandise without the permission of the merchant or person owning or lawfully holding that merchandise knowing or reasonably believing that the tool or device will be used to commit or attempt to commit larceny.

Deactivate a theft detection device or remove a theft detection device from any merchandise in a retail establishment prior to purchasing the merchandise with the intent to commit or attempt to commit a larceny.

A person who violates subsection (1) is guilty of a crime as follows:

Except as provided in subdivision (b), a misdemeanor punishable by imprisonment for not more than 1 year or a fine of not more than $1,000.00, or both.

If the person has a prior conviction for violating subsection (1), a felony punishable by imprisonment for not more than 4 years or a fine of not more than $4,000.00, or both.