The families of those killed in the 2012 Sandy Hook Elementary School mass shooting are begging NBC to pull Megyn Kelly’s interview with Infowars conspiracy theorist Alex Jones, currently slated to air on Father’s Day—and hinting that legal action could follow if the station pushes ahead with the program. Lawyers representing 12 parents and family members sent a letter to NBC bigwigs on Thursday afternoon, asking them not to run the interview with Jones, who has claimed that the mass shooting was a hoax perpetrated by “crisis actors.” The letter claims that NBC is providing Jones with “legitimacy” and inflicting “serious emotional distress” on the families. Twenty young children and six staff members died in the massacre. Kelly has promised that her interview will be hard-hitting and will “press” Jones on Sandy Hook, but critics have blasted the trailer promoting it. Late Thursday, Jones revealed he secretly recorded Kelly and published audio that appears to indicate the new NBC hire promised to go easy on him in the interview.