execution. translator: when i saw as a parent, when i saw him on top of him i said, okay, now my son is safe, maybe he can arrest him. what was so surprising, pulled the gun and blow off his head. reporter: the 26 year old native of the congo was pulled over last monday. the plate doesn t belong on this car. reporter: after a brief exchange. 1915, got one running. reporter: lyoya begins to run and a physical struggle ensues. hands behind your back. reporter: video shows the two wrestling, the officers taser is discharged twice, police say never making contact. at one point lyoya appears to have his hands on the taser before being brought to the gound. reporter: while police say the body camera was unintentionally shut off during the skirmish, another recorded by his passenger shows the officer on top of him, shows him