NEW : Man has confessed in death of woman found in suitcase , authorities say . Comment: Hassan Malik , 55 , was arraigned Tuesday on a count of second-degree murder . Malik said he was acting in self-defense , Vollero said . NEW : Malik said he was acting in self-defense , DA spokeswoman says . DA spokeswoman : He admitted bludgeoning and strangling Betty Williams 28 .
NEW : Man has confessed in death of woman found in suitcase , authorities say . Comment: Hassan Malik , 55 , was arraigned Tuesday on a count of second-degree murder . NEW : Malik said he was acting in self-defense , DA spokeswoman says . DA spokeswoman : He admitted bludgeoning and strangling Betty Williams 28 .