WHITE PLAINS, New York (AP) -- An autopsy has revealed that a man found dead in a suitcase in a suburban park was a drug "mule" who had 50 packets of heroin in his body and probably died when one or two of them broke open.

Investigators expressed surprise that the man's body had not been cut open for the drugs. The heroin would have been worth an estimated $100,000 on the streets, Westchester County police spokesman Kieran O'Leary said Tuesday.

The man, estimated to be 50 to 60 years old, has not been identified. Investigators aren't sure who put him in the suitcase found last Thursday in Tibbetts Brook Park in Yonkers, just north of New York City