It was not, however, until 2006 that a systematic archaeological research followed after the Georgian and Cypriot governments agreed to jointly investigate the ruins.
For reasons not clear to Hulan and David, the Chinese and American governments come to the unusual agreement that the two should jointly investigate the murders.
Ecuadorian authorities have formed partnerships with Colombian, Venezuelan, U.S., and Chinese officials to jointly investigate several trafficking cases.
It also recommended improvements for the so-called Instant Response Teams, which comprise police officers and child welfare workers who jointly investigate the most severe abuse or neglect cases.
Nicaraguan authorities collaborated with the governments of neighboring countries to jointly investigate two trafficking cases over last year.
He said the department was investigating jointly with his office's sexual assault and rape analysis unit.
Pakistan was invited to jointly investigate the incident, but Pakistan refused to participate.
The matter was referred to the APS and the GPO, who jointly investigated the possibility of using airgraphs.
F.B.I. agents and city police detectives have been jointly investigating the murder of Mr. Castellano for four years.
The IDF and the Palestinian Security Authority is jointly investigating the incident.