New York (CNN) -- A man arrested in connection with the death of 28-year-old Betty Williams, whose body was found in a suitcase, has confessed to bludgeoning her with a frying pan and strangling her with an electrical cord, authorities said Tuesday. Hassan Malik, 55, was arraigned Tuesday on one count of second-degree murder, according to Manhattan District Attorney spokeswoman Joan Vollero. Malik said he was acting in self-defense, Vollero said. Shortly after Williams' body was discovered, police released a surveillance video that showed a man dressed in a dark knit hat and leather jacket, pulling a suitcase that contained Williams' body near a stoop in East Harlem, New York.
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NEW: Man has confessed in death of woman found in suitcase, authorities say
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NEW: Hassan Malik, 55, was arraigned Tuesday on a count of second-degree murder
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NEW: Malik said he was acting in self-defense, DA spokeswoman says
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DA spokeswoman: He admitted bludgeoning and strangling Betty Williams 28
As police were leading @placeholder away, a reporter asked, "Are you sorry for what you did?"