OLATHE, Kan. (AP) -- Johnson County's prosecutor says Kansas Bioscience Authority managers violated policy but not the law by charging personal expenses to the agency's credit card.

District Attorney Steve Howe said Friday its investigation found policy violations related to travel and personal expenses and a lack of supporting documentation for expenditures.

Howe says former KBA president and chief executive officer Tom Thornton violated both the expense and credit card policies.

The prosecutor said no criminal charges would be filed against KBA or its personnel.

The KBA was established in 2004 to nurture bioscience companies in the state. It has come under scrutiny from Gov. Sam Brownback and other Republicans over its management and investments under Thornton, who resigned last year to take a job in Ohio.