Chilling phone calls between the two men who plotted to murder Justin Bieber have been released by authorities. In the tapes, convicts Dana Martin and Tanner Ruane are heard discussing strategies to castrate the 18-year-old singer with "hedge clippers" and suffocate him with a scarf. The calls originated from the New Mexico prison where Martin, reportedly obsessed with Bieber, is currently serving out a life sentence for the rape and murder of a teenage girl. The two men are also heard discussing price, with would-be hitman Ruane asking for "five large" — or $5,000 — for murdering Bieber and his bodyguard.

Want to hear the audio??  CLICK HERE