Another Waterloo woman has been arrested in connection with an investigation into a drug operation involving a Mexican cartel, according to the Waterloo Cedar Falls Courier. 33 year old Karissa Foust has been charged with Money Laundering. She is accused of sending $942 obtained through the sales of methamphetamine, heroin, and fentanyl to a recipient in the Mexican state of Sinaloa in October. Samuel Monroe, Rylee Wenman, Megan Heying, Richard Mohorne, Mark Sayles, and Jordan Aswegan have also been charged as part of the investigation.