Opening arguments were heard Tuesday in the federal gun trial of Hunter Biden, who is the first child of a sitting president to ever face a criminal trial. Hunter Biden is accused of illegally purchasing a gun at a time when he was using drugs. On Tuesday, prosecutors played audio recordings of Hunter Biden reading the audio book of his memoir about his struggle with an addiction to crack cocaine. Biden’s lawyer Abbe Lowell said Biden did not “knowingly” lie about his drug use when filling out forms to purchase the gun.