# Another CSI BS Question

**URL:** <https://boards.straightdope.com/t/another-csi-bs-question/422720>\
**Category:** Factual Questions\
**Created:** [October 14, 2007, 10:18pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720 "2007-10-14T22:18:55Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![LiveOnAPlane](https://avatars.discourse-cdn.com/v4/letter/l/3d9bf3/32.png) [@LiveOnAPlane](https://boards.straightdope.com/u/LiveOnAPlane)\
**Post date:** [October 14, 2007, 10:18pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/1 "2007-10-14T22:18:55Z")

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They take in a free diver and do the usual autopsy. They say “There is no extra nitrogen in his blood.” Uh…after this body has been laying for hours and hours on the table? I was not aware of a test that determines the nitrogen saturation of your blood, and after years of Scuba diving, I was taught that upon returning to normal pressure, the nitrogen out-gasses. Furthermore, the murder victim was a free diver, not a Scuba diver. In 5-7 minutes, how the fuck is he gonna get any significant nitrogen saturated in his blood anyway?

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**Author:** ![Tenebras](https://avatars.discourse-cdn.com/v4/letter/t/977dab/32.png) [@Tenebras](https://boards.straightdope.com/u/Tenebras)\
**Post date:** [October 15, 2007, 7:45am UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/2 "2007-10-15T07:45:31Z")

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I think it has something to do with UV flashlights.

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**Author:** ![bdgr](https://avatars.discourse-cdn.com/v4/letter/b/a87d85/32.png) [@bdgr](https://boards.straightdope.com/u/bdgr)\
**Post date:** [October 15, 2007, 8:11am UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/3 "2007-10-15T08:11:08Z")

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And who music.

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**Author:** ![Loach](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/loach/32/350_2.png) [@Loach](https://boards.straightdope.com/u/Loach)\
**Post date:** [October 15, 2007, 12:46pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/4 "2007-10-15T12:46:11Z")

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And sunglasses. Don’t forget the sunglasses.

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**Author:** ![Q.E.D](https://avatars.discourse-cdn.com/v4/letter/q/51bf81/32.png) [@Q.E.D](https://boards.straightdope.com/u/Q.E.D)\
**Post date:** [October 15, 2007, 4:32pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/5 "2007-10-15T16:32:36Z")

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This is the same show which, during a single episode, stated that 9.8 meters per second squared is “terminal velocity” (it isn’t) and that a GFCI device required a ground connection to function properly (it doesn’t). I wouldn’t put much stock in any of their “science.” They seem to get stuff right more from luck than actual research.

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**Author:** ![Flander](https://avatars.discourse-cdn.com/v4/letter/f/8c91f0/32.png) [@Flander](https://boards.straightdope.com/u/Flander)\
**Post date:** [October 15, 2007, 4:48pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/6 "2007-10-15T16:48:24Z")

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[QUOTE=LiveOnAPlane]  
I was not aware of a test that determines the nitrogen saturation of your blood,..  
[/QUOTE]

In CSI, it’s call a DNA test.

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**Author:** ![drachillix](https://avatars.discourse-cdn.com/v4/letter/d/48db29/32.png) [@drachillix](https://boards.straightdope.com/u/drachillix)\
**Post date:** [October 15, 2007, 4:53pm UTC](https://boards.straightdope.com/t/another-csi-bs-question/422720/7 "2007-10-15T16:53:30Z")

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[QUOTE=Flander]  
In CSI, it’s call a DNA test.  
[/QUOTE]

Duh, Diver Nitrogen Assessment, comon…anyone with a degree in bottle rocketry knows that.

Jeez…all these smart people and nobody knows about Diver Nitrogen Assessment

Taking longer than we thought indeed. 😉