Real reporters and the jury actually noticed that the accused had an iPhone 4 at the time, which DOES NOT support accessing Siri [unless jailbroken, of which there was no evidence supplied to indicate it was], AND that all the prosecution introduced was a screen-shot of the Siri request.
You know, the ones that were popular when Siri first was released and Siri would respond with something cute/weird/disturbing to cute/weird/disturbing questions....
So, I guess he drove to the woods, then fired up his web browser and put in 'Siri, I need to hide my roommate.", then saw the screen shot, saved it to his camera roll, then proceed to ignore the advice in the image with a "Fuck this, I'll just dump him here".