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TODAY. >> ISAAC HOLTZ WALKED OUT OF THE DALLAS COUNTY COURTHOUSE FOLLOWING HIS INITIAL APPEARAN IN HANDCUFFS. HE SPOKE EXCLUSIVELY WITH KCCI AS I ASKED IF HE SENT THE THREATENING EMAILS TO WAUKEE SCHOOLS AND IF SO, WHY? >> I DID SEND THE EMAIL, BUT THE REASON WAS WAS I WAS BEING THREATENED IN JOHNSTON BECAUSE SO WHAT HAPPENED WAS LIKE I WAS JUST WALKING IN JOHNSTON A THEN -- SOMEBODY HOLDS OUT A GUN TOWARDS ME AND THEN A COUPLE DAYS LATER I SEE SOMEONE SENDS , OUT LIKE A LITTLE WHAT’S IT CALLED A TEXT THAT WAS VERY THREATENING. I FELT VERY THREATENED. I WAS THE ONE THAT WAS BEING THREATENED. >> WAUKEE SCHOOLS SENT A MESSAGE TO PARENTS SAYING, WE WERE MADE AWARE OF A THREAT TO THE SAFETY OF OUR STAFF AND STUDENTS SUNDAY VIA EMAIL. ACCORDING TO THE CRIMINAL COMPLAINT, HOLTZ SENT THE EMAIL TO ALL STAFF AND TWO STUDENTS. HE THREATENED QUOTE TO COME TO , SCHOOL WITH A GUN AND SHOOT ALL THE STUDENTS. AS WELL AS OTHER SPECIFICS REGARDING ACTS AGAINST STUDENTS DURING FOURTH BLOCK. >> IT WASN’T REALLY ME EMAILING THE THREAT. IT WAS MORE OF ME JUST SAYING HEY THIS IS WHAT WAS GOING ON , AND I WAS IN GREAT THREAT. >> YOU ARE SAYING YOU DID NOT READ THAT EMAIL? THAT THREAT WAS SENT TO YOU? >> YEAH, I

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The 19-year-old man charged with threatening Waukee High School students and staff admitted to KCCI on Monday that he sent an email threatening to "shoot up" the school.Isaac Holtz is charged with making a threat of terrorism.Holtz spoke to KCCI's Tommie Clark in handcuffs as he left the Dallas County Courthouse following his initial appearance."I did send the email, but the reason was I was being threatened in Johnston because … so what happened was, like, I was just walking in Johnston and then, um, somebody holds out a gun towards me," Holtz said. "And then a couple days later, I see someone sends out, like, a little, what's it called? A text that was very threatening. I felt very threatened. I was the one that was being threatened."The Waukee Community School District sent a message to parents, saying, "We were made aware of a threat to the safety of our staff and students Sunday via email."According to the criminal complaint, Holtz sent the email to all staff and two students.In the email, he threatened "to come to school with a gun and shoot all the students." The email also included other specifics regarding acts against students during fourth block."It wasn't really me emailing the threat," Holtz said. "It was more of me just saying, 'Hey, this is what was going on and I was in great threat.' Like, that was why."Holtz said the email was a "copy and paste" of threats against him.RAW: Suspect in Waukee school threats talks to KCCIThe criminal complaint said officials at Waukee High School believed the email threat was from Holtz due to prior threats he had made earlier in the school year.Holtz also allegedly "left a four-minute rambling phone call."The criminal complaint said Holtz admitted to police that he had sent out the emails when he was arrested.Holtz is being held on a $50,000 cash-only bond. He is not allowed to go within 500 feet of Waukee schools.A Dallas County judge said Monday that Holtz is a danger to the community and a flight risk.