Because the evidence of Makarov's involvement in the airport massacre died with Allen, Task Force 141 is sent to a favela in Rio de Janeiro to capture Makarov's weapons dealer, based on intel on the weapons used at the airport. There, after capturing the dealer, they learn that Makarov's worst enemy, known only as "Prisoner 627", is incarcerated in a Russian gulag east of Petropavlovsk. Task Force 141 assaults the prison and manages to free 627, who is revealed to be Captain Price.[b]