Testimony began in the Bill Cosby trial began Monday.

FOX's Gurnal Scott reports from the courthouse in Norristown, Pennsylvania:

Andrea Constand is the one and only plaintiff in this sexual assault case against the comedian, but late this afternoon a second accuser, allowed by the judge to testify, detailed a Los Angeles encounter with Cosby a little more than two decades ago where she said she passed out after taking a "large white pill" he gave her.

Prosecutors hope the account establishes a pattern of behavior by the comedian. Cosby's defense continues to hammer at Constand's credibility and what they say is her changing story as day one of the trial comes to a close.

At the court house in Norristown, Pennsylvania, Gurnal Scott, FOX News.

Follow Gurnal Scott on Twitter: @GurnalScott