Another article says that they plan on installing 4 K-9 door poppers - only 2 are installed currently. This car was one of them. http://www.westernjournalism.com/boom-3-thugs-tried-to-brutally-murder-his-partner-this-k-9-wasnt-having-it/
Get your own K-9 Door Popper for $1100. http://www.radiotronics.com/index.php?p=catalog&parent=1&pg=1