Officer Jeronimo Yanez's claim that he saw Castile drawing a gun is utterly implausible.
http://reason.com/blog/2017/06/21/philando-castile-video-shows-a-cop-who-p
Much has been made of the fact that the dashcam video of the July 6, 2016, traffic stop in which Philando Castile was killed, which was finally released to the public yesterday, does not show what was going on inside his car—in particular, where he was reaching and for what. Jeronimo Yanez, the St. Anthony, Minnesota, police officer who shot Castile, initially said he thought Castile was reaching for a gun. Later he claimed to have seen Castile pulling out the pistol, which was found in a pocket of his shorts. Notwithstanding the gap in the video record, which the jurors who acquitted Yanez of second-degree manslaughter last week evidently thought was enough to create reasonable doubt, his story is utterly implausible.