http://www.citylab.com/crime/2015/09/the-study-that-brought-down-volkswagen/407149/

A closer look at the West Virginia report at the center of the VW emissions scandal.

Michigan’s Stefanopolou says computer sensors monitored the steering column. Under normal driving conditions, the column oscillates as the driver negotiates turns. But during emissions testing, the wheels of the car move, but the steering wheel doesn’t. That seems to have have been the signal for the “defeat device” to turn the catalytic scrubber up to full power, allowing the car to pass the test.

Andrew: Sheer genius. Pure evil. A great example of the power and importance of software.