Criminalist Catherine Willows of the Las Vegas Police Department has has collected her last DNA sample.  Marg Helgenberger, who has played the role since CSI‘s premiere in 2000,  wrapped her 263rd – and last – episode of the show on Wednesday.

She was sent off in style with a party, where her castmates presented her with some mementos,  including Catherine’s vest and badge.  Helgenberger commented:

“I’ve been thinking a lot about this moment for a very long time.  From the bottom of my heart, thank you for the time of my life.”

Despite the high emotion, Helgenberger was still able to crack a joke.  She said:

“I won’t miss swabbing inside of someone’s mouth.”

Catch Helgenberger’s final episode on January 25th.

[ Images by A. Miller/WENN.com ]

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