The extent of the deputies injuries are unknown and it is not guaranteed they will be able to return to work. The County will pay like any other employer paying workman's comp medical which means in reality there will likely be expenses that are not covered. Deputies will be paid on sick leave but they will likely get base pay not full pay.
LA county has deep pockets but many cops injured in the line of duty for small counties and municipalities, especially those permanently injured, unfortunately very much need go fund me type fund raisers.