A new probe of financial scandals at theCalifornia Department of Parks and Recreationfound that officials maintained a hidden cash surplus for as long as 20 years – far longer than previously known.

The investigation by the California state auditor, released Thursday, tracked a surplus going back to 1993 in the State Parks and Recreation Fund, the primary fund that collects and disburses revenue generated by the 278 state parks.

The Bee first reported in July that department officials maintained a secret surplus in this fund which at the time amounted to $20 million. Although the surplus amount varied over time, no evidence has emerged that the money was spent illegally.

Read more at the Sacramento bee