Yes. The police, like any government agency, needs to state both the scope of its work and provide metrics for how taxpayers can expect their money spent. This expenditure should include how it achieve its goals and what progress should look like. Then let the people judge the methods are consistent with public expectations of accountability.
Police have repeatedly shown an incapability to behave, respect, or function as a person who has to be responsible for their actions. They cannot be allowed to operate without oversight.