This a massive topic.
Focus on:
After you narrow it down, then add Sacramento to the mix.
Example:
1980's, Anti-Drug Abuse Act in 1986 included mandatory minimum targeted crack cocaine.
Keyword search: "Anti-Drug Abuse Act" 1986
I get back a lot of books and articles about drugs laws in the 1980's which are useful for background on this topic.
If I add "Sacramento" to this search, I get nothing, so lets try Sacramento, 1980's, crack, still nothing. We need to use newspaper searches. Try the Sacramento Bee Newspaper and The Observer.