Howard K. Stern, the longtime attorney and companion to former Playboy model and television personality Anna Nicole Smith, who died Feb. 8 in Florida, filed a federal defamation suit on April 13 against Houston lawyer John O’Quinn.

Stern alleges in the complaint, filed in U.S. District Court for the Southern District of Florida, that O’Quinn, an attorney for Smith’s mother Virgie Arthur, repeatedly made false and defamatory public statements alleging that Stern caused the death of Smith and her son, Daniel, for Stern’s own financial gain.