Spokane County voters were narrowly approving a proposition to increase the local sales tax to support criminal justice and public safety Tuesday. The 0.1 percent sales-tax increase will cost consumers an additional $1 on a $1,000 purchase and raise about $6 million a year. It appeared to be passing late Tuesday night, with 52 percent supporting it and 48 percent opposing it, though thousands of absentee ballots remain to be counted.