Audio of the foiled plot to castrate and murder teenage popstar Justin Bieber has been released.

Last year we reported on the plan to kill the singer at his Madison Square Garden show in November. Now newly released tapes reveal convicted murderer Dana Martin discussing the matter with Tanner Ruane, the nephew of his former prison inmate Mark Staake.

Martin, who has a tattoo of the Canadian heartthrob on his leg, refers to the purchase of "hedge clippers," thought to have been intended to castrate the singer and his bodyguard, reports KOAT 7.

justin bieber

The plot to murder and castrate Justin Bieber has been foiled

"Did he go over the Bieber thing with you?" Martin asks Ruane in a taped conversation he made from inside Southern New Mexico Correctional Facility, where he is serving two life sentences for the rape and murder of a 15-year-old girl.

"Nah. The way I like to work dude, I like to know as little as possible," Ruane said. "He's gonna use one of the things you gave him, and then he's gonna take care of it."

Authorities believe "take care of it" means to murder the pop star, and Ruane can be heard requesting $5,000 for each one he gets - again "gets" referring to murder.

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Police say Martin contacted Stakke and told him the plan using code words. In another call, Martin can be heard telling Stakke to "kill the pitbulls and you're going to castrate them," with the "pitbull" the codeword for Bieber. He also is heard giving detailed instructions on how to strangle Bieber with his signature paisley scarf.

Strangely, it was Martin who informed police of the plot before it was carried out.

Staake, 41, was arrested by federal agents on November 19 in Vermont on violation of felony probation for aggravated burglary with a deadly weapon in New Mexico, News10 ABC previously reported.

Ruane, 23, was arrested at a gas station in Rotterdam, N.Y., the following day. He was found with murder tools and documents containing information about the intended victims.

A spokesman for the singer told Hollywood Life: “We take every precaution to protect and insure the safety of Justin and his fans.”

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  • NEW YORK - SEPTEMBER 01: Musician Justin Bieber visits the Nintendo World Store on September 1, 2009 in New York City. (Photo by Bryan Bedder/Getty Images)

  • NEW YORK - NOVEMBER 15: Justin Bieber performs on ABC's Good Morning America' at ABC News' Good Morning America Times Square Studio on November 15, 2009 in New York City. (Photo by Michael N. Todaro/WireImage)

  • NEW YORK - DECEMBER 11: Justin Bieber attends the Z100s Jingle Ball 2009 presented by H&M at Madison Square Garden on December 11, 2009 in New York City. (Photo by Jim Spellman/WireImage for Clear Channel Radio)

  • LOS ANGELES, CA - FEBRUARY 13: Singer Justin Bieber poses after his free performance presented by KIIS-FM at Nokia Plaza L.A. Live on February 13, 2010 in Los Angeles, California. (Photo by Angela Weiss/Getty Images)

  • NEW YORK - NOVEMBER 26: Justin Bieber promotes his new book 'First Step 2 Forever' at Barnes & Noble, 5th Avenue on November 26, 2010 in New York City. (Photo by Andy Kropa/Getty Images)

  • LOS ANGELES, CA - MAY 15: Justin Bieber attends KIIS FM's 2010 Wango Tango Concert at Staples Center on May 15, 2010 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)

  • Teen idol Justin Bieber arrives on the red carpet for the 68th annual Golden Globe awards at the Beverly Hilton Hotel in Beverly Hills, California, on January 16, 2011. AFP PHOTO/Valerie MACON (Photo credit should read VALERIE MACON/AFP/Getty Images)

  • LONDON, ENGLAND - FEBRUARY 16: Justin Bieber attends the 'Justin Bieber: Never Say Never' premiere at the O2 Cineworld on February 16, 2011 in London, England. (Photo by Jon Furniss/WireImage)

  • LAS VEGAS, NV - MAY 22: Singer Justin Bieber poses in the press room with the Digital Artist of the Year award during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images)

  • NASHVILLE, TN - JUNE 08: Justin Bieber attends the 2011 CMT Music Awards at the Bridgestone Arena on June 8, 2011 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)

  • Singer Justin Bieber attends the 2011 BET Awards at The Shrine Auditorium on June 26, 2011 in Los Angeles, California. (FilmMagic)

  • UNIVERSAL CITY, CA - AUGUST 07: Singer Justin Bieber arrives at the 2011 Teen Choice Awards held at Gibson Amphitheatre on August 7, 2011 in Universal City, California. (Photo by Jon Kopaloff/FilmMagic)

  • Singer Justin Bieber arrives at the The 28th Annual MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (WireImage)

  • NEW YORK, NY - SEPTEMBER 08: Justin Bieber attends the Dolce & Gabbana Boutique on September 8, 2011 in New York City. (Photo by Eugene Gologursky/Getty Images for Dolce & Gabbana)

  • Singer Justin Bieber poses in the press room at The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)

  • ATLANTA, GA - SEPTEMBER 17: (EXCLUSIVE COVERAGE) Musician and 2011 Horizon Award Recipien Justin Bieber poses backstage at the 33rd Annual Georgia Music Hall Of Fame Awards at the Cobb Energy Performing Arts Center on September 17, 2011 in Atlanta, Georgia. (Photo by Ben Rose/WireImage)