LOT of 'red flags' on this story.
1. Girls say Mororcyclist cut THEM off in the Parking lot - Bike riders are pretty darn paranoid in parking lots. They tend to let the 2-ton vehicle have the right-of-way.
2. Girls say motorcyclist ran into them - see number 1 above
3. Girls say they made obscene gestures at the motorcyclist - Could be the motorcyclist was following them home to report their behavior to parents.
4. Dad was at the end of the drive way brandishing a pistol - Intent to cause harm, or at the least threatening
5. Dad shot the guy 3 times when he passed by the house a second time. Claims 'self-defense' - I believe the girls ran into the motorcyclist in the Target parking lot (hence the "collision Evidence"). The biker was following them home to report the incident to the parents. Girls got scared, mage up a story and called Dad. Dad did what Dads do, went to protect his daughters, unfortunately his first thought is to grab his .40 cal semi. Motorcyclist sees Dad in the driveway with a gun and drives past. Motorcyclist ends up turning around (cul-de-sac?? Dead end?? Guy not familiar with area and knows to get out the way he came in? Doesn't matter) and driving by the house again. Somehow, in Dad's mind (could be for any number of reasons) Dad takes this a threat and shoots the dude three times, killing him.
I cannot wait until the actual truth comes out on this. Bte I'm not too far off.