14-Year-Old Girl Threatens To Kill Justin Bieber’s Ex-Girlfriend Caitlin Beadles

File under "D" for "disturbing, depressing": the LAPD has issued a search warrant for a 14-year-old girl who's threatened the life of Justin Bieber's ex-girlfriend, Caitlin Beadles.

According to TMZ, an anonymous blogger on Tumblr, the social-media site, wrote about planning to "murder" Beadles and warning that the 17-year-old aspiring actress wouldn't know what hit her until she "wakes up on the other side of her bed with a knife." Police identified the perpetrator as a 14-year-old girl from Kentucky who's developmentally disabled; her mother is apparently "closely monitoring her internet activities."

Meanwhile, Selena Gomez' stalker, Thomas Brodnicki, remains a "serious threat" to the 19-year-old actress and current Bieber girlfriend.

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