The woman in this story is charged with putting some fairly disgusting stuff on her husband's computer in an attempt to frame him. Investigators checked out the computer and found the pictures were put on the computer at a time when her husband wasn't at home.

With linux is there a log that is usually kept or that could be enabled that would log any changes in the system's date or time? Is there a way to tell if someone had gone into the bios, changed the date and then changed it back? I have to wonder if this woman would have gotten away with it if she had changed the date before putting the pictures on the computer, then changing it back.

http://www.foxnews.com/us/2013/12/23/pennsylvania-woman-tried-to-frame-hubby-with-child-porn/?intcmp=latestnews

-- 
"I get my copy of the daily paper, look at the obituaries page, and if I’m not there, I carry on as usual."

Patrick Moore