(FBI agents raid the Calexico Vo Clinic)...This is the second time FBI agents raid the clinics.

The agents issued  a warrant on the Calexico Clinic and reportedly took several documents with them. Homeland Security Investigations raided Vo Clinics in October. In both incidents, nobody is saying why the Clinics have been targeted. Doctor Tien Vo says his attorney is trying to find answers. The FBI will not comment, and Homeland Security has still not explained the October raid. The FBI traditionally never comments on on-going investigations.