Californian state senator Melinda Batson's recently graduated aid Kristen Marley was pushed from a Sacramento bridge, staged as a suicide. The rumor of an affair with Melinda's husband and chief of staff Elliot is denied and he has an alibi, but Jane taxes their marriage loveless. CSI concentrates on Kristen's dubious stepbrother Harlan McAdoo, who expected a false alibi from her in another crime. Patrick turns a false trail into a crucial clue. And handles Bosco's obstruction in his Red John interest.