Increasingly, federal officials are joining with California police agencies to prosecute drug trafficking and other drug-related activities. California authorities are said to bring knowledge of the local territory, while federal investigators bring the resources and the power of federal courts. In one such combination of efforts, a number of alleged gang members were recently arrested in California.The combination of California and federal police actions resulted in 22 arrests. More than 400 local and federal officers served warrants at more than 20 locations in California. The secret operations ended last month, as authorities alleged that a member of a gang agreed to sell 10 pounds of methamphetamine and four kilograms of cocaine to undercover agents for $200,000. Three alleged gang members were arrested, and a total of six people were charged with conspiracy to distribute methamphetamine and sell firearms without a license.