Ex-FBI agent said Guthrie family should be 'upset' as DNA handling raised questions in ongoing disappearance probe.

Agents say scammers are impersonating law enforcement or government agents.

Elaine Lipka's first trial in October ended in a mistrial after John Lipka told the jury that he and his wife had been given a lie-detector test by the FBI. Granger declared a mistrial because lie detector tests can't be admitted as trial evidence.