(SkyNews) Justin Bieber was to be strangled and castrated as part of a gruesome kidnap plot ordered by an obsessed jailed killer, according to a bizarre court case in the US.

Mark Staake, 41, and his 23-year-old nephew Tanner Ruane from New Mexico were allegedly commissioned by convicted killer Dana Martin to murder four men, including the pop superstar and his bodyguard.

Martin, who met Staake in prison, apparently gave exact details as to how the plot was to play out.

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