[s13e10] Risky Business Class -

The investigation is complicated for when she must collaborate with Doug Wilson , an investigator from the NTSB and a former lover from her time in San Francisco.

Jeffrey had been siphoning millions from Helen's accounts. To cover his tracks, he replaced Helen with an impostor—his sister, Marcia—and sent a private investigator who had uncovered the fraud onto the ill-fated Chicago-bound flight. He sabotaged the plane to kill the investigator and destroy evidence. Character Arc: Sara’s Relationship Strain [S13E10] Risky Business Class

Reconstruction of the wreckage reveals that the crash was not an accident. Evidence points to Jeffrey Forsythe , a trustee managing the estate of a wealthy woman named Helen. The investigation is complicated for when she must

The episode features a dual narrative focusing on a tragic aviation disaster and the personal relationship strain between Sara Sidle and her husband, Gil Grissom. He sabotaged the plane to kill the investigator

Five people are killed in the accident. Because the aircraft was a private charter with no manifest, the CSI team’s first challenge is identifying the victims.

is an episode of the long-running police procedural CSI: Crime Scene Investigation , originally aired on December 12, 2012.

The core investigation begins when a small executive charter plane crashes just a mile off the Las Vegas Strip, narrowly missing a major casino.