The death of Brittany Probst, 22, of Vevay last weekend is under investigation by the Switzerland County Sheriff's Department and the Indiana State Police.

Police have arrested Cherie Ann Duesing, 52, and Amanda K. Fuerst, 21, each on class D felony charges of failure to notify authorities of discovery of a body or moving a body from a scene.

Authorities found Probst's body at the Castaways Yacht Club Marina on State Road 156, owned by Duesing, on Sunday at about 5 p.m. after Switzerland County Sheriff's Department Detective Richard Lock was called to investigate a possible drug overdose.

According to a probable-cause affidavit filed in Switzerland Circuit Court, Duesing, Fuerst and Probst drove to Cincinnati on Thursday, May 7, and purchased heroin.

"Throughout Thursday evening and early Friday morning (Probst) and (Fuerst) shot heroin through the veins of their bodies and (Duesing) snorted the heroin," Lock wrote in the probable-cause affidavit.

On Friday morning, Duesing and Fuerst found that Probst was not breathing, and believing that she was dead, they placed her body in a sleeping bag and put it into the bed of Duesing's black Ford F-250 pickup with the intent of hindering the criminal investigation, according to the probable- cause affidavit.

"During the early morning hours of Friday, May 8, and Sunday, May 10, (Fuerst) and (Duesing) conspired together and drove the deceased to areas in Kentucky to dispose her body into the river," Lock wrote in the probable-cause affidavit.

"The law says, in the event of a death you have to contact law enforcement or a coroner, and they didn't do that," Lock, the lead investigator in the case, said this morning.

Switzerland County Coroner Lewis Fritter, Sheriff Nathan Hughes and Lock all said there is nothing to indicate any form of foul play in Probst's death.

An autopsy has been done, and Fritter said he is waiting the standard four to six weeks for toxicology test reports.