FBI files: Gotti's "son" betrayed him to feds

Today's New York Post features an article taken from FBI documents detailing how Dapper Don John Gotti's "adopted son" betrayed him while Gotti was dying in Springfield:

When Gotti was stricken with cancer and moved to a medical prison facility in Springfield, Mo., Kasman publicly railed against the government for the medical treatment Gotti received.

Meanwhile, the self-described adopted son secretly told the feds of Gotti's plans to pass the reins of the Gambino crime family.

Kasman was so entrenched with the Gottis that he held up to $11 million of their money at a time and dished out cash for their expenses, lawyers and emergencies.

When Gotti died, Kasman was entrusted to give the eulogy at his funeral and read aloud letters and poems written by the clan.

By 2005, the betrayal shot into high gear as Kasman donned a wire to record conversations with Gotti's jailed brother Peter, who had become boss, as well as with the late don's children Peter and Victoria, and numerous powerful wiseguys.

Kasman told the feds he'd paid hundreds of thousands in cash to Gotti lawyers, including Gerald Shargel and Joseph Corozzo, who represented Gotti brothers Peter and Richard in 2002.