NEW YORK, NY November 29, 2008 —Police say it may prove difficult to identify individual shoppers who trampled on a Wal-Mart worker killed at a Long Island store during Black Friday's buying frenzy.

REPORTER: Nassau County police are reviewing surveillance video from the Valley Stream store. A crowd smashed down the doors just after 5 a.m. Police say other workers were trampled as they tried to rescue Jdimytai Damour of Queens. Detective Seargent Anthony Repalone was a witness.

REPALONE: While he was on the ground, he was certainly stomped upon by hundreds of people either stepping on him directly or stepping around him.

REPORTER: A woman who is eight months pregnant, and three other people, suffered minor injuries. Police say there was not enough security at the store. Arkansas-based Wal-Mart says it had tried to prepare for Black Friday by adding staff and outside security workers. But the company won't say how many staffers it had on hand in Valley Stream.