“Not the most credible” implies he had a tendecy to dishonesty. There may be a measure of “the boy who cried wolf.” Maybe they made a decision on where to best use finite resources, something they do every day. When they’re right, it doesn’t make the news.

I don’t know whether it’s that in this case, or straight-up malfeasance. But I don’t think it’s absurd to take into account a person’s history of being unreliable when deciding whether or not to SWAT someone.