MANKATO-October 17, 2012-(KMKO)-A 45-year-old St. Peter man has entered a guilty plea in Blue Earth County Court to a charge of fourth degree drug sales.  In exchange for Russell Schnitzler's guilty plea, a felony charge of third degree drug sales was dropped.  He was accused of selling three types of prescription pills last June to an undercover drug informant.  Schnitzler will be sentenced in December.