I agree. I'd have respected him more if he just took accountability for HIS snake. HIS snake, HIS responsibility. Leave the comment about the friend out of the conversation, or at least own up to it. Accidents happen, I get that, but own it when the animal is your responsibility.
I also find it irresponsible, because of the size of the snake, that he waited 5 days to alert neighbors. I'd be pretty angry if my cat, puppy/small dog or whatever went out to pee or play and never came back, only to find out a 14 foot burm was loose somewhere in the neighborhood.
I hope the snake is found, and uninjured. The "Find it, shoot it" comment is disheartening. It's not the snake's fault...