Definitely a sad story and a good example of piss poor judgement.
While I wasn't there myself, my brother was running northbound on I-5 up to Portland and saw the chase heading southbound. One pretty nice EB (I've got him trained) with about 7-8 cop cars on his tail, followed by several more catching up to the group. My brother didn't think the speeds seemed high at all, more like O.J. Bronco speeds than anything else, but maybe at some point he was speeding excessively. Regardless, it sucks to see any EB make the news for something like this, but thankfully no LEO's or innocent people got hurt in the mess.