You may have heard of 56-year-old Bill Witty from KY3's investigative story into a Harrison doctor.

His daughter, Jillian, died of a drug overdose in 2015. Witty believes the man who was with Jillian when she died was a patient of Dr. James Hawk and that's how she got the drugs.

"He certainly had a doctor-patient relationship with the guy who took my daughter to Texas," Witty had said in a previous interview.

Hawk is under an emergency order of suspension, and papers show the Arkansas state medical board is looking into Witty's claims.

But Witty was arrested Friday after police say he was making terroristic threats to an FBI agent in Fayetteville.

In the affidavit, it said it all started when a former distant relative of FBI Agent Robert Cessario said the agent might be able to help Witty investigate the death of his daughter.

Agent Cessario said Witty started texting him about a year ago, and he sent Witty a message to come to the FBI office in Fayetteville if he wanted to speak with him.

The court records say the "communications" from Witty started again two months ago. Agent Cessario blocked Witty's phone number - but Witty could still leave voicemails.

The affidavit said on June 15, Agent Cessario said he received a voice message saying "I think it's time for you to stop covering up, or to stop trying to protect yourself and do your job." The message then goes on to say "I hope to h*** you get fired for this. I hope to h*** you go to the pen for this. I hope to h*** you know what it's like to suffer and lose somebody."

Agent Cessario said after that message he was concerned and reported it to his supervisors.

Then on June 28, Agent Cessario said he received a voice message that said "I wanna know that you destroyed that gang rape tape that you have of my daughter" and then goes on to threaten him.

In the documents, Agent Cessario said he has no knowledge of Witty's daughter or the tape.

According to the Northwest Arkansas Democrat Gazette, Agent Cessario is under investigation for wiping the hard drive of a computer used to gather evidence in a separate corruption case.

Witty's lawyer said Witty was concerned that Agent Cessario may have erased evidence from his computer that was relevant to the investigation into the death of his daughter, and said the inspector general's office contacted Witty about those concerns just days before Witty was arrested.

Witty's lawyer also believes this is a case of entrapment, and no one reached out to Witty between the first voice message on June 15 and the second on June 28.

He also adds Witty did not intend to terrorize or harm anyone, and the voice mail was made in frustration after repeated efforts to speak with the agent.