Jeffrey E. Campbell (born 22 December 1982), better known as Agent Sasco, and Assassin, is a Jamaican dancehall deejay.

[3] In the mid-2000s, he started an internet based degree in Business Management from the University of Sunderland.

[1] His single "Talk How Mi Feel" reached number one on the Jamaica Countdown Chart in June 2011.

[5] In 2013, he was featured on the song “I’m In It” by American recording artist Kanye West on his 6th solo album, Yeezus.

[7] In February 2015, Assassin was featured on the song "The Blacker the Berry" by Grammy award winner Kendrick Lamar.