CSI EPISODE
Law of Gravity
Season	7
Number	15
Writer	Anthony E. Zuiker
Director	Richard J. Lewis
Original Airdate	February 8, 2007

Law of Gravity is the fifteenth episode of season seven in CSI: Crime Scene Investigation.

SummaryEdit

When one Trenton cop is murdered in Las Vegas hotel room, a second one threatens to expose secrets from Keppler's past if he doesn't make the case and evidence go away. Meanwhile, Grissom returns from his sabbatical and questions Keppler's methods.

TriviaEdit

• Final appearance of Michael Keppler.