TRENTON, N.J., April 3 (UPI) -- A man charged in New Jersey with killing his mistress allegedly tried to poison her before bludgeoning her, a lawyer claimed.

Rosario DiGirolamo has been charged with the murder of Amy Giordano, who vanished last June. Human bones found in a pond in Staten Island in New York City have not yet been positively identified as Giordano's.

The revelation is only the latest in a string of scintillating details from George Vomvolakis, who represents John Russo, a Staten Island man charged with tampering with evidence in the case, The Times of Trenton, N.J., reported Thursday. Vomvolakis has also told reporters that Giordano's head and hands were not recovered and suggested that DiGirolamo got the idea from an episode of "The Sopranos."

Vomvolakis said that DiGirolamo gave Giordano a drink spiked with sleeping pills, but it just made her drowsy.

Jerome Ballarotto, DiGirolamo's lawyer called Vomvolakis' latest claim "ridiculous."

DiGirolamo pleaded guilty in Delaware last year to abandoning the son he fathered with Giordano shared in a hospital parking lot. The 1-year-old had a note pinned to his clothes purporting to be from his mother and reading like a suicide note.