CSI

A few years back, I was in a physical anthropology class.  It was a class dedicated to human biology, and the cultural and evolutionary adaptations brought on by human physiology.  However, it was also pretty much a prerequisite for anyone wanting to enter the Criminology program.  A large chunk of the class involved identifying human remains, using actual human skeletons.  In short, it was a lot of fun.

The professor was a forensic anthropologist specializing in bones (yeah, this was before that 'bones' show came out), and she had a lot of police ties.  And one day, she called in two cops.

They started talking about crime scene assessment.  Early on, one of the cops asks, "So, who among you have ever watched the TV show CSI?"

Maybe three hands, in a class over forty large, are raised.  He shakes his head.  "Come on." 

The professor sheepishly raises her hand.  So does most of the class.

"Good.  That's more like it.  Now, how much of that show do you think is accurate?"

A few people in the class guess.  Forty percent?  Sixty percent?  People discuss all the inaccuracies they know about the TV show - DNA sampling isn't done so quickly, forensic anthropologists do not perform suspect interviews or carry firearms, there's no nation-wide program of fingerprints, etc.  The cop nods at each point, and then cuts in.
"Forty percent?  Sure, sure," the cop says, turning to smile at his partner.  Then he turns to face the class.

"I don't know about you... but the first thing *I* do on the crime scene is turn on the fucking light."