Five Men and One Woman Sentenced for Meth Trafficking Conspiracy

Robert Henry Heyer, Jr., a/k/a Bobby Heyer, age 49, from Peoria, Arizona, was sentenced on March 8, 2021, to 280 months in federal prison, followed by 5 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Andrew Charles Anderson, a/k/a Andy Anderson, age 44, from Sioux Falls, South Dakota, was sentenced on December 14, 2020, to 60 months in federal prison, followed by 3 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Rex Leon Burtis, age 57, from Coleman, South Dakota, was sentenced on October 26, 2020, to 144 months in federal prison, followed by 5 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Jacquelyn Ann Muhs, age 45, from Dimock, South Dakota, was sentenced on May 18, 2020, to 120 months of federal prison, followed by 5 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Alex Geoffery Lang, age 26, from Sioux Falls, South Dakota, was sentenced on May 11, 2020, to 114 months in federal prison, followed by 5 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Christopher F. Vonwille, age 58, from Sioux Falls, South Dakota, was sentenced on October 21, 2019, to 180 months in federal prison, followed by 5 years of supervised release, and a special assessment to the Federal Crime Victims Fund in the amount of $100.

Vonwille was indicted on March 5, 2019; Muhs and Burtis were indicted on May 8, 2019; Lang was indicted on June 6, 2019; and Anderson and Heyer were indicated on January 7, 2020.

Vonwille pled guilty on August 2, 2019; Lang pled guilty on January 28, 2020; Muhs pled guilty on February 24, 2020; Anderson pled guilty on September 23, 2020; and Heyer pled guilty on October 5, 2020.

Burtis was found guilty as a result of a federal jury trial in Sioux Falls, South Dakota, on July 28, 2020.

Beginning at an unknown date and continuing until on or about January 7, 2020, in the District of South Dakota and elsewhere, Defendants knowingly and intentionally combined, conspired, confederated, and agreed together, with others known and unknown, to knowingly and intentionally distribute a mixture and substance containing 500 grams or more of methamphetamine, which is a Scheduled II controlled substance.

This case was investigated by the U.S. Postal Inspection Service, Drug Enforcement Administration, Sioux Falls Police Department, Minnehaha County Sheriff’s Office, and the Department of Criminal Investigation.  Assistant U.S. Attorney Jennifer D. Mammenga prosecuted the case.

All Defendants were turned over to the custody of the U.S. Marshals Service following their sentencings.