You will need a criminal defense attorney and you will also need to contact your insurance company immediately so that they can open a claim and begin paying for any personal injury damages that you and your passengers may have suffered.
Given the facts that you have provided, it seems that the likelihood that the claimant will prevail is minimal. Even if the claimant were to receive a settlement it would certainly seem likely to be quite small. Your insurer will handle this matter for you and likely settle the claim for a nominal amount. At this point, it would be premature to consider the need to protect your personal assets in my opinion.
Certainly, the toxicology report is essential evidence in the case. Depending on the results of this test defense counsel may want to conduct testing with the use of an independent defense expert. Therefore, it is quite important that this information be provided to the defense as early as possible in the case so that defense has time to conduct such testing without being forced to waive Defendant's right to speedy trial. Given that this critical evidence has not been provided to defense in...
This could be a battery or an assault depending on the specific facts of the situation. You should report any concerns regarding this situation to law enforcement so that they can follow up on the matter. Best of luck.