Frisbie, 38, is in the United States Penitentiary in Atlanta. Frisbie is in the facility's satellite camp for minimum-security male inmates, a prison spokesperson said.
In November, U.S. District Court Judge Larry McKinney sentenced Frisbie to two months in prison, four months on home detention with electronic monitoring and two years of probation.
Frisbie went to prison on Feb. 2. Prison officials said his projected release date is listed as unknown.
Frisbie was allowed to leave court after his sentencing, and was notified by the federal court when he was to start serving his sentence.
Frisbie could have been sentenced to 10 years and prison and assessed a $250,000 fine.
Frisbie's arrest came at the culmination of an investigation by the Federal Bureau of Investigation and Indiana State Police after allegations surfaced that Frisbie had stolen funds from the Putnam County Sheriff's Department to provide training and accommodations for employees of his person business, Frisbie Security Consulting LLC, and to pay for travel expenses for his stepdaughter and pay himself back for expenses the department had already reimbursed him for.
The thefts -- six separate instances -- took place between January 2006 and March 2008, and totaled just under $12,000.
Frisbie pled guilty to the charge in August, a week after he resigned from the department.