[WA] Brother-in-law drove into oncoming traffic with pregnant wife

(Editing to add: My point in making this post was to learn if this is something he could’ve gone to prison for x amount of years for, or whatever the legal repercussions would be. If I pass that information onto my sister I’m hoping it would open her eyes to how serious her situation is)

I’m new to Reddit and posting but here it goes:

So fairly recently I learned my brother-in-law, in the midst of a heated discussion, drove into oncoming traffic on a highway with my pregnant sister in the passenger seat. He evidently course-corrected before damage was done, but is this something that he should/can be held legally accountable for?

My spouse and I view it as a direct attempt on his and her life, and reckless endangerment to other nearby vehicles.

I also feel the need to mention, this took place about 2 years ago, but we only found out recently.