Teen Who Prompted Lone Tree Lockdown Charged

By Lee Hermiston, Reporter

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By Richard Pratt

LONE TREE, Iowa -- The Lone Tree teenager who went to the high school there armed with a knife, prompting a lockdown, has been arrested.

According to criminal complaints, 18-year-old Daniel G. Jansen has been charged with going armed with intent, a class D felony, and carrying a knife with a blade longer than 8 inches, an aggravated misdemeanor.

Authorities said Jansen went to Lone Tree High School at 9:30 a.m. Sept. 23 wearing a skeleton mask and a dark coat. Police said he was wielding a knife with a 9 1/4 inch blade. Jansen was stopped at the entrance of the school by the superintendent and high school administrator and a struggle ensued.

Police said Jansen made statements that he intended to kill the school staff and others at the school. He attempted to pull the knife during the struggle.

School staff was able to get the knife from Jansen and he was detained. Rather than go directly to jail, Jansen was taken to the University of Iowa Hospitals and Clinics for evaluation. Jail records show he was booked at the jail at 12:30 a.m. Monday. Jail records show Jansen is no longer in custody. Court records indicate he is scheduled to make an initial appearance Tuesday morning and he has been ordered to continue mental health treatment.

Jansen has no prior criminal history in the state of Iowa, according to online records.
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