From your post;
"It’s unclear who fired the fatal shots and what prompted the killings pending the police investigation."
The story doesn't state anything about someone being a 2nd amendment supporter.
Are you going to BS, something about the NRA also ??
Nice of you to read, demonstrates that you do have the ability to function your brain.,now, look up the story further and find that the police determined it to be a murder /suicide.
TOS.