A Pennsylvania woman claiming to have killed more than 20 people said the death penalty is “cruel and inhuman punishment," the justice system is “infallible” and subjects “inappropriate persons to the death penalty," TMZ reported Tuesday.

Miranda Barbour, accused of satanic cult killings. Twitter/@NewsBreaker

Miranda Barbour, 19, told a reporter she stabbed a man to death after setting up a Craiglist encounter with her newlywed husband, CNN reported.

The Los Angeles Police Department is investigating claims that one of the possible 20 murders may have occurred in L.A., according to NBC Los Angeles.

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Barbour claimed in the interview with Pennsylvania’s Daily Item that she wants to plead guilty to killing Troy LaFerrara, and that she has been in a satanic cult.

She also claimed to have killed people from Alaska to North Carolina, NBCLA.com reported.

During the interview with reporter Francis Scarcella, Barbour estimated to have helped killed 100 victims over the years, and started at age 13. 

Read about more crime in the L.A. area:

Wrong Way Driver In 60 Freeway Collision Charged With Murder

Pasadena Boy Calls 911, Saves Sister From Choking To Death

Contact Heather Navarro or follow her on Twitter.