In that case, according to a grand jury indictment handed up this month and obtained by CNN, Dutschke is accused of molesting three girls under the age of 16.
This arrest prompted him to close his tae kwon do dojo. After the arrest, he consented to the seizure of his laptop computer, a hard drive and several flash drives, the affidavit in the ricin case states.
Investigators searched these and found that on New Year's Eve 2012 someone had downloaded a publication, "Standard Operating Procedure for Ricin," about safely handling the toxin. They also found that another file, about a method for detecting ricin, had been downloaded about two hours later. But according to the affidavit, Dutschke insisted that he'd never researched anything about ricin and that he'd never even seen a castor bean.
Whether it was Dutschke or someone else, and whatever their motivation, the ricin-tainted letters could have done more than make headlines or scare people.
They could have killed.
If inhaled, injected or ingested, less than a pinpoint of ricin can kill a person within 36 to 48 hours due to the failure of the respiratory and circulatory systems. There is no known antidote.
In a seeming acknowledgment of these dangers, the FBI issued a statement Tuesday stating it had "immediately sealed off" Dutschke's former tae kwon do facility -- which is near an auto body shop and an ice cream parlor -- and contacted public health authorities in the interest of public safety.
"The FBI is now conducting further forensic examination for the purpose of identifying trace evidence, residues and signatures of production that could provide evidence to support the investigation," the agency said.