The San Diego Sheriff's Department announced Tuesday they they are transferring the case of the missing McStay family to the FBI.
Joseph McStay, a Fallbrook businessman; his wife, Summer; and their two children, Gianni 4, Joseph Jr. 3 were last seen in February 2010. A group of people resembling the McStays was spotted on surveillance video crossing into Mexico at the San Ysidro border crossing on Feb. 8.
"Over the last three years, the Sheriff's Department has conducted an exhaustive missing person investigation in an attempt to locate the family," read the statement from the sheriff's department. "Hundreds of tips have been investigated without success."
The sheriff's department said they reached a consensus that the family went to Mexico of their own free will. The case will now be handled by the FBI, with the sheriff's department playing a supporting role.
Since their disappearance, the McStays haven't used their bank accounts, credit cards or cell phones and have made no communication to the U.S. that investigators are aware of.
Anyone with information about the whereabouts of the McStay family is urged to call Crime Stoppers at 888-580-8477.