FWIW, the department (almost) never pays for criminal defense lawyers. Instead, cops under a collective bargaining agreement usually have liability insurance paid for by their union. Non-union cops will sometimes have liability insurance as a employee benefit, either provided partially or fully covered.
Those that have no liability coverage either from a union or employer will have to buy it privately, which is not uncommon. It’s not super expensive, but it’s not nothing, something between $500 and $1,200 annually.
I hoe she has something because the attorney bills are coming.