Please help diagnose ... suspension?

[clueless1]

I was driving today, going around a corner in a parking lot (very slowly, thank goodness), and my steering suddenly went out. Meaning the back end is looser than a porn star. Feels like I am driving in snow on summer tires, and I cannot keep the car straight, even when I am driving in a straight line.

I managed to pull it back home (verrrrry slowly), and after I pulled in and parked I noticed that that the left REAR tire/wheel is NOT pointing straight ahead (it is pointing significantly to the left as if it were one of the front tires with the steering wheel turned left). When I had looked at the rear earlier in the parking lot the tires were straight, so I am assuming that one (or more) of the parts that stabilize the position of the left rear wheel went kablooey. Could a wheel bearing do that?

I should also note that both rear cv joints are known to be bad (and I have the complete rear cv axles, which I will be replacing).

Can anybody help diagnose or narrow down?

Thanks.