; and (4) a list of ongoing investigations that have exceeded the expected time allotted for completion by Board order and an explanation for the additional time required to complete each such investigation. 8. Authorization of appropriations (a) In general There are authorized to be appropriated for the purposes of this Act such sums as may be necessary. (b) Fees, refunds, and reimbursements (1) In general The Board may impose and collect such fees, refunds, and reimbursements as it determines to be appropriate for services provided by or through the Board. (2) Receipts credited as offsetting collections Notwithstanding section 3302 of title 31, any fee, refund, or reimbursement collected under this subsection— (A) shall be credited as offsetting collections to the account that finances the activities and services for which the fee is imposed or with which the refund or reimbursement is associated; (B) shall be available for expenditure only to pay the costs of activities and services for which the fee is imposed or with which the refund or reimbursement is associated; and (C) shall remain available until expended. (3) Refunds The Board may refund any fee paid by mistake or any amount paid in excess of that required. 9. General authority The Board shall investigate or have investigated (in detail the Board prescribes) and establish the facts, circumstances, and cause or probable cause of— (1) deaths in police custody; (2) officer-involved shootings; or (3) uses of force that result in severe bodily injury in police custody. 10. Inspections and autopsies (a) Entry and inspection An officer or employee of the Board— (1) on display of appropriate credentials and written notice of inspection authority, may enter property where a incident has occurred or evidence from the incident is located and do anything necessary to conduct an investigation