How do police gain evidence for child porn?

AFAIK entrapment is encouraging someone to break the law so you can book them for it. Simply setting up shop in an illegal activity and busting those who come to visit doesn't encourage the law-breaking in any way.
 
lol like duh.

When does rubbish like entrapment stop the American government?


Breaking the law to uphold the law :rolleyes:

Of course, I do not mean to say that the actions of these extremely sick people (the pedophiles) are right. I just think that if people are going to try and uphold the law, they could at least work with it rather than against it.
 
AFAIK entrapment is encouraging someone to break the law so you can book them for it. Simply setting up shop in an illegal activity and busting those who come to visit doesn't encourage the law-breaking in any way.
Indeed. Setting up "The Crack Store" on high street as a sting operation would not be entrapment unless you, the officers, were actively encouraging people to purchase your wares.
 
I did some work with the Akron police in this area. I was surprised to find how restricted they are. There is a national database of child porn photos where they've previously proven in court that the child or children pictured are illegally underaged. They MD5 all of these and make the sums searchable. Computer forensic techs search the computer and MD5 sum any suspicious photos or videos. If it matches the database they'll get an arrest.

Essentially they run md5 /* > md5.txt

It's completely different busting the actual pornographer, not a trafficker. In that case they need to do the footwork and find the child(ren) and verify their ages.

Wouldnt simply changing the filename, or altering just 1 pixel of a picutre, cause a different md5 value to be generated which would not match the un-edited photo md5 values?
 
AFAIK entrapment is encouraging someone to break the law so you can book them for it. Simply setting up shop in an illegal activity and busting those who come to visit doesn't encourage the law-breaking in any way.

They're encouraging people to sign up for this site and when they have the details, thats when they'll hit them.
 
Saw a TV program about this a few months back, a group of officers are in a room somewhere scanning through every image found on a persons pc that has been confiscated, and searching websites looking at images trying to catch people. They are all sent for mandatory counselling every few months.
 
every single image will be looked at.
There is no other way you can do it.

It's just something you put at the back of your mind and don't think about. Eventurally you will get used to looking at such images.
 
Wouldnt simply changing the filename, or altering just 1 pixel of a picutre, cause a different md5 value to be generated which would not match the un-edited photo md5 values?
Exactly. The filename doesn't matter to the checksum but shifting one bit would change the result. If that happened they'd need to take the photo they suspect is CP and do an old-fashioned investigation to figure out who's pictured.
 
They're encouraging people to sign up for this site and when they have the details, thats when they'll hit them.

Not quite the same thing though, is it?

Officer: Sign up to this website or I'll blow your mother's brains out.
Innocent guy: *gulp* Ok...
Officer: You're nicked.

Isn't quite the same as:

1) Set up scummy website explicitly stating what it's about, with a sign-up form.
2) Bust the ***** who sign up.


I can certainly see the difference, even if you can't LOL

BTW I saw the docu too, great stuff. Those guys do a great job and certainly follow through. Anyone remember the recent Interpol case where the perp had altered (swirled/de-pixelated) his face and they managed to restore the image and set up a man hunt? They caught him in Thailand eventually iirc.
 
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Exactly. The filename doesn't matter to the checksum but shifting one bit would change the result. If that happened they'd need to take the photo they suspect is CP and do an old-fashioned investigation to figure out who's pictured.

Also i quickly checked wikipedia, and see that a md5 hash is 128 bit, so there are only 2^128 possible hashes, so wouldnt it mean there is also a possibilty of some random file just happening to have the same hash as some CP? In which case MD5 hash checks fail, as it would require checking all the images by hand anyway.
 
Never heard of the md5 hash checking - from what I've been told, they do view every image/video to check for content.

It's quite possibly the worst job on the planet :(
 
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