Abdul-Latif, 35, formerly known as Joseph Anthony Davis, pleaded guilty in December to charges he and a co-defendant planned to carry out an attack on Seattle's Military Entrance Processing Station in 2011, the news website Seattlepi.com reported.
U.S. District Judge James Robart noted during sentencing -- which includes 10 years of supervision after incarceration and could possibly have been a life sentence -- reflects a troubled investigation that included a deceitful informant and a detective who destroyed evidence.
The judge criticized what he called the "at best, sloppy" destruction of evidence by Seattle police detective Samuel DeJesus and the confidential informant, a five-time convicted sex-offender who was paid more than $100,000.
The FBI's Joint Terrorism Task Force and the Seattle Police hired the informant to get information on the plot, which included taped telephone conversations that could not be retrieved on DeJesus' phone, the Seattle Times said Monday.
Abdul-Latif and his partner, Walli Mujahidh were arrested after Abdul-Latif paid the informant for rifles and grenades disabled by federal agents, the newspaper said.