It sounds to me like the guy shot the juvenile first. Juveniles usually are hidden. I totally doubt the story that he was threatened by the mother then attacked by the two young. That sounds like something you'd say after the fact if it looked bad.
Delta Zu, I have been pondering "PSI" intelligence in Sasquatch for years. The opportunity for an excellent field test has surfaced. The alleged shooter goes camping in the area of the alleged shooting incident. The alleged shooter will not need much food or water and should leave a DNA sample with one of the DNA experts who post on the BFF.