JM 9-61.111
Consistent with available resources, organized ring cases and multi-theft operations of motor vehicles involving an interstate or foreign aspect should be Federally investigated and prosecuted. To the extent possible, the investigation and prosecution of this type of professional criminal activity should be conducted in coordination and cooperation with State and local authorities. If the State or local authorities are unable to prosecute the jointly investigated cases, Federal prosecution should be undertaken insofar as is consistent with available resources.
[cited in JM 9-61.710]