By Keith Coffman CENTENNIAL, Colo. (Reuters) - A woman who survived Colorado's movie theater massacre found an escape route blocked by bodies, she told jurors on Tuesday in the murder trial of gunman James Holmes. Holmes, a 27-year-old former neuroscience graduate student, has pleaded not guilty by reason of insanity to multiple charges of murder and attempted murder in the rampage at the theater, which was showing the Batman movie "The Dark Knight Rises." His long-awaited trial began in Arapahoe County District Court in nearby Centennial on Monday. On Tuesday, the prosecution's first witness, Katie Medley, described how she was nine months pregnant when she went to see the movie with her husband Caleb, an aspiring stand-up comedian. The brain injury Caleb Medley suffered left him unable to walk or speak clearly.