NEW YORK, Jan. 28 (UPI) -- Disgraced former pharmaceutical executive Martin Shkreli has responded to rapper Ghostface Killah's recent insults by threatening to erase the Wu-Tang Clan member from a rare album he bought from the group for $2 million.
Shkreli, 32, who sits in front of three masked figures in a new video, demanded an apology from the recording artist for criticizing and calling him an expletive during an interview with TMZ last week.
"You have to listen to me. I butter your bread, do you understand me?" Shkreli said in the video. "I expect you to write me a written apology from the heart. Some contrition, some long letter where you explain your sorrow and sadness for what you've done."
In November, Shkreli anonymously purchased Wu-Tang's album, Once Upon a Time in Shaolin, for $2 million. A month later, it was revealed that Shkreli was the buyer -- a disclosure that dismayed some fans of the rap group.
In retribution for the criticism, Shkreli threatened to erase Ghostface Killa's contributions to the album.
"You're an old man -- an old man that's lost his relevance -- and you're trying to claim the spotlight from my spotlight," he said of the rapper. "In fact, I think that if you ever say some dumb [expletive] again, this album, this Shaolin, I'm going to erase all your [expletive] from this album."
Shkreli reiterated his demands Thursday, tweeting, "As mentioned in my video, I expect a written apology, @GhostfaceKillah. At least 500 words, no grammatical errors and Shaolin stays intact." He had previously tweeted, "Don't cry, Ghost. All rap careers come to an eventual end."
Shkreli gained international notoriety last year after his former company, Turing Pharmaceuticals, acquired the 62-year-old drug Daraprim and raised the price by 5,000 percent -- from $13 to $750 per tablet.
"I am confident I will prevail. The allegations against me are baseless and without merit," he tweeted in December.