Alberto Geddis Martinez, better known as Alpo Martinez, Abraham G. Rodriquez (witness protection), or more simply as Alpo or Po (June 8, 1966 – October 31, 2021) was an American drug dealer from Harlem, New York City.

[3] Martinez later moved to Washington, D.C. to expand operations where he quickly became involved in the city's underworld and elevated his drug activities.

[8][9] Martinez was released in 2015 while serving a 25-year sentence for 14 counts of murder at ADX Florence, a federal supermax prison located in Fremont County, Colorado.

He was released after testifying against former associates and had been living under a United States witness protection program in Lewiston, Maine, under the assumed name, Abraham G. Rodriquez, until shortly before his death in 2021.

Shakeem Parker, 30, who was arrested in February 2022 and charged with the slaying of Martinez, was acquitted on July 13th 2024 in New York.