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Input: David Berkowitz  the notorious "Son of Sam" serial killer   has been hospitalized at the Albany Medical Center Hospital  where  he  will undergo an emergency heart surgery  The Times Union noted.
 Berkowitz  has been in prison since 1978  after  he  went on a killing spree with a .44 caliber revolver that ultimately left six dead and seven others wounded between 1976 and 1977  The Times Union said.
According to a statement from the state Department of Corrections and Community Supervision  " Berkowitz  has been transferred to an outside hospital and remains in the custody of the Shawangunk Correctional Facility."
During  his  killing rampage   Berkowitz  targeted young women and couples sitting in cars  The Daily Mail reported.
 He  left letters behind at two murder scenes in which  he  referred to  himself  as the "Son of Sam " a reference to a neighbor  he  claimed was a demon. In  his  letters   Berkowitz  said Sam's dog had been giving him orders to kill.
Upon his arrest  he was sentenced to 25 years in prison for each of the six murders and  during his time behind bars   Berkowitz  became a reborn Christian.
"There was a battle going on inside  me  " he said.
 Berkowitz  said  he  thought  he  was doing something to "appease the devil" by murdering  his  victims.

Son of Sam David Berkowitz Hospitalized With Heart Ailment