A jury on Wednesday found Doug Guetzloe, the founder of Ax the Tax, guilty of not filing personal income tax returns for 2005 and 2006, years in which he made nearly $400,000.

The jury of seven women and five men deliberated for about half an hour before reaching its decision. 

Guetzloe, , 57, who could face a minimum of 15 months to two years in federal prison, will be sentenced May 21.

Guetzloe's defense rested Wednesday morning without calling any witnesses, leaving jurors little chance but to convict, one juror told reporters after being dismissed.

"The evidence that was presented seemed to be fairly cut and dried," said juror William Carlisle. "We all know when we are supposed to file taxes and that goes without saying he should have known as well and we believe he did in fact know."

An IRS agent testified that Guetzloe would owe about $40,000 in taxes on the income, estimated to be about $375,000.

The government only had to prove Guetzloe made more than about $16,500 in those years and willfully did not file tax returns.

Defense attorney Donald Eest argued Guetzloe did not intend to break the law, in part, because "no one from the IRS told him, if you file late you will go to federal prison."

But the juror, Carlisle, said that "just simply didn't make any sense."

Testimony showed Guetzloe had filed returns up to six years late in 10 of 15 years dating to 1992 without facing criminal penalties.