SOUTH LAKE TAHOE, Calif. – Former South Lake Tahoe mayor Tamara Wallace could face up to 20 years in federal prison for embezzling close to $390,000 from a local church while keeping its books. The U.S. Attorney’s Office charged Wallace on Tuesday with one count of wire fraud, which could result in 20 years prison time, a $250,000 fine or both, plus up to three years of supervised release. The U.S. attorney’s filing likely means Wallace has waiv…