LOS ANGELES (CBSLA.com) — The FBI announced Friday that one of their most wanted fugitives has been arrested in Mexico.

Jose “Joe” Luis Saenz, 37, one of the agencies Ten Most Wanted, was nabbed Thursday.

The FBI said Saenz was captured as part of a joint task force involving Mexico’s Secretaria de Seguridad Publica (Secretariat of Public Security/Mexican Federal Police); the Instituto Nacional de Migracion (Mexican National Institute of Immigration) and the Procuraduria General de la Republica (Mexican Attorney General), as well as the FBI’s legal attaché in Mexico City and its Guadalajara Sub-Office.

Saenz — who had 20 aliases –  was wanted for at least four murders (two rival gang members, his girlfriend) in LA County. In addition to allegedly working for a drug cartel, he was also wanted for kidnapping, rape and unlawful flight to avoid prosecution. Saenz’s crime spree reportedly ran from 1998-2008.

He was added to the Most Wanted list in October 2009. There was a $100,000 reward for his capture.

The one-time fugitive returned to Los Angeles Friday.  Reporters asked a handcuffed Saenz if he had a comment as he was being put into a waiting patrol car. Saenz said, “Not guilty” before chuckling.

Reporting for CBS2 and KCAL9, Bobby Kaple said the FBI was remaining mum about the details of the arrest but said they would hold a news conference on Monday.