SUTTER COUNTY (CBS13) – The individual who allegedly sent family members of missing woman Alycia Yeoman ransom messages has been located, the Sutter County Sheriff’s Department says.

The department states it has determined that this person is not involved with Yeoman’s disappearance and has no knowledge of her whereabouts.

Yeoman, a 20-year-old Gridley resident, has been missing since March 30.

“Law enforcement is working with prosecutors on potential criminal charges pertaining to this matter,” a statement from the sheriff’s office reads.

The FBI  is offering a $5,000 reward for information regarding Yeoman’s disappearance. Her family says private donations have increased that reward now to about $20,000.