A rural eastern Missouri man charged with child porn counts has also been accused by the FBI of threatening to kill the heads of various online platforms, including YouTube and Twitter.

ST. LOUIS — A rural eastern Missouri man charged with child porn counts has also been accused by the FBI of threatening to kill the heads of various online platforms, including YouTube and Twitter. 

Matthew Bryan Thilges, 56, of Jefferson County, pleaded not guilty Tuesday in St. Louis' U.S. District Court to attempted production of child pornography and receipt of child porn, the St. Louis Post-Dispatch reported. 

The FBI said Thilges began making the threats against tech company CEOs in July. By October, Thilges also was making threats against police and prominent Democrats, the FBI said in an arrest affidavit.

The threats led federal agents to search Thilges' home in late October, which turned up eight assault rifles, a pistol, two loaded 100-round drum magazines and a tactical vest with three loaded pistol magazines and four loaded rifle magazines, the FBI said. Agents also found a "child-like sex doll" and thousands of images of child pornography that had been deleted from his computer and one that hadn't.