Off-duty cops. On-duty, the government is literally telling them to arm themselves and go around confronting people. I'm not sure how to get around that shy of eliminating guns for officers, and I don't think that'll fly in the US.

I don't think people are understanding this is a criminal trial, and the jury must be convinced beyond a reasonable doubt. A rock could convince a jury that a group of teens that went 100+ on the shoulder to grab pizza might do something stupid, and that an officer might confront reckless driving and felony speeding while off-duty. This result is not surprising.

There might still be a civil trial, and I hope there is. I'm not sure qualified immunity will apply here, since reckless driving is sometimes specifically called out as something off-duty police are highly discouraged from confronting people over. Depends on the local policies and regulations.