Pondering about the weight used to lower LPJD down (at least trying) .....and trying to go in the killers mind. It will not get het identity back....but maybe...ringing bells.
Indeed folieadeuxnola, it is not an item you would have usually carrying around, or have lying in your car (but everything is possible of course) and why just use one....(going on a training session with a friend, you would have two, so why not use both, for "safety") You would also have two if you have/use them at home or a gym.
My bad shadow mind says..he/she needed the other one for another body...
or he/she was inexperienced, this was a once, "spontaneous", no research/thinking it out use of the weight....and brings me back to a husband-killer... Killing her most likely happened at home.
Who would do such a thing.. ? I think the stabbing was the first thing that happened, as I recalled reading she was stabbed in her face (very personal I think) ...then putting a bag around her face...must be a sadistic killer or somebody close...overkilling, totally outraged. My gut feeling says...the pregnancy could be the trigger....maybe the baby was from another man than the man she was married/had a relation with or her, married, -so called- lover snapped.
It is common for body's to come up again when lowered down in water, even with weights. I know some nasty cases in Europe where a body came up again, even when weighted down.... Still I don't understand the place she was found, was she weighted down in deeper water and ended at the place she was found...or indeed Folieadeuxnola....he/she was not from the area....but I think you would pick a place where you could actually see somebody disappearing in the water (just to be sure...OMG)
Not getting any further....