MINNEAPOLIS (WCCO) — A couple were charged Friday in the death of a University of Minnesota student last fall.

Shavelle Oscar Chavez-Nelson, 32, and Ashley Marie Conrade, 24, were both charged with second-degree intentional murder, according to the Dakota County Attorney James Backstrom.

“This was one of the most extensive investigations ever to occur in Dakota County’s history,” Backstrom said.

The victim, 20-year-old Anarae Schunk, was reported missing by her family on Sept. 23, 2013, and she was found stabbed to death seven days later. Searchers found her naked body in a ditch near a corn field in Rice County.

Schunk was with her former boyfriend, Chavez-Nelson (aka Anthony Lee Nelson) on the night he shot Palagor Jobi to death at a Burnsville bar – and one day before she was reported missing.

Ashley Concorde was also with Schunk and Chavez-Nelson – her boyfriend at the time – on that night, and brought them back to her Rosemount home after the fatal shooting.

Investigators found several items of physical evidence at Concorde’s home that pointed to Schunk’s stabbing death at the scene.

“Anarae Schunk was a lovely, intelligent and kindhearted young woman who will always be remembered and deeply missed by many,” Backstrom said. “Our deepest sympathy is extended to Anarae’s family and friends.”

Chavez-Nelson is currently in Stillwater prison for Jobi’s murder, and has five more years to serve. His next court appearance in the Schunk case will be on July 11.

Conrade’s bail was set at $2 million, and her next court appearance will also be on July 11.