LINCOLN, Neb. (AP) — A couple considered persons of interest in the death of a Nebraska woman now face a series of charges in an unrelated gold coin scheme.

A grand jury has leveled 14 counts against 51-year-old Aubrey Trail and 23-year-old Bailey Boswell for allegedly defrauding two people of more than $400,000.

Investigators allege that Trial used a false name in November 2015 when he convinced a Kansas couple of entering a joint venture to purchase a gold coin, with the understanding they would later sell the coin and split the profits. However, the coin wasn’t worth what Trial claimed, said Assistant U.S. Attorney Steven Russell.

“As part of the scheme, Trail and Boswell set up false documents and websites to convey the appearance of a legitimate transaction,” Russell said.

Trail’s lawyer, Korey Reiman, said his client will plead not guilty next week.

The two are also persons of interest in the death of 24-year-old Sidney Loofe. Authorities have said Loofe disappeared Nov. 15, a day after going on a date with Boswell arranged on Tinder, an online dating app. Loofe’s body was found in December in rural Clay County.

Trail and Boswell have denied their involvement in Loofe’s disappearance and death in videos posted to social media.

Trail has 11 felony convictions that are largely related to theft or fraud. Boswell has no felony convictions, but has an open case in Pennsylvania. Boswell remains in a Wilber jail. Trail was recently transferred to the Leavenworth Detention Center, a maximum-security facility in Kansas.

Trail and Boswell met in Missouri in 2016, and they traveled to antique shows and shops around the U.S. Federal prosecutors charged them last year with transporting stolen goods across state lines from Kansas to Nebraska.