A Billings man has denied charges filed after the coffee at this mother's tax preparation business was spiked with methamphetamine.

The Billings Gazette reports 34-year-old Craig Charles Benedict pleaded not guilty Tuesday to felony criminal endangerment during his arraignment in District Court.

Prosecutors allege Benedict put meth in coffee that was consumed by as many as 11 people on Feb. 8 after becoming angry that another employee asked him to submit to a drug test. One woman reported being "unusually jittery" while a recovering drug addict noticed less intense effects than when she was using.

Prosecutors allege Benedict bragged to his mother about the prank and told his girlfriend he put about a half-gram of the drug into the coffeemaker.

Benedict is free after posting a $10,000 bond.