Guilty pleas have been made by four defendants in an Ishpeming meth bust made last year.
The charges stem from November 26, 2012 after Upper Peninsula Substance Enforcement Team detectives raided a home located on Seventh Street in Ishpeming.
The case was sent to federal court in Marquette.
Chad Warlin and Kelley Warlin both pled guilty to conspiracy to distribute a controlled substance. Their sentencing is scheduled for August 14.
Justin Saari entered a guilty plea to manufacturing a controlled substance and will be sentenced on September 20.
A fourth defendant, Patrizia Benstrom, pled guilty to possession of a list one chemical, with the knowledge that it would be used to manufacture meth. Sentencing for Benstrom will be October 23.