[ChocChipCookie]

At first my BIL and SIL thought the photos were on their computer, but they weren’t. They were on the neighbor’s computer but they were “shared”.

[KayEyeDoubleDee]

At first my BIL and SIL thought the photos were on their computer, but they weren’t. They were on the neighbor’s computer but they were “shared”.

Well Jesus Christ - why didn't they call the cops immediately?!?

[AmericaUnited]

They were on the neighbor’s computer but they were “shared”.

That is somewhat different but still you need to call the police since they most likely downloaded them from your network.

[usconservative]

At first my BIL and SIL thought the photos were on their computer, but they weren’t. They were on the neighbor’s computer but they were “shared”.

From your initial post, I couldn't tell if the folders were on your BIL/SIL's machine or the neighbors. Now that it's clear they're on the neighbors, they should be reported to the police for illegally tapping into your BIL/SIL's internet access, and informed that they're aware child porn is being downloaded illegally, and without their permission, through their wireless internet connection.

Having said all that, the next step should be to secure the wireless internet connection so that others aren't able to tap into their wireless connection again.

Some suggested enabling WEP. WEP is easily hackable, and should only be used as a last resort. WPA Pre-Shared Key is the most secure. If your BIL/SIL don't know how to secure their wireless intenet, they should find a reputable pc service company to do it for them. (Note: that does NOT mean "geek squad" or "firedog.")