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Water just seems like the easiest way to disappear a body and assuming he acted alone, I think moving bodies is not easy. Simplest/easiest explanation is in the water together, but I suppose one may make the effort in separating them.
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sbm, bbm
also, the water in florida has alligators. perp may have been hoping they would dispose of the evidence
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as to motive, my gut tells me it was about SA, and NB was the target. we'll see what the evidence shows. i suspect ZL's murder was part of that plan. the idea that HA somehow used ZL to lure NB makes sense to me. he's their point of connection. why else would she go talk to him? under this scenario, the purpose of murdering ZL was either because ZL found out what he was planning and tried to stop him, or to keep ZL from contradicting whatever HA was going to say to lure her.
learning that she received a call from HA and then went outside, never returning, makes me think the fact that she left her laptop there may not reflect a sense of urgency, but rather an expectation that she would be returning momentarily.
what did HA say to her? i suspect nothing threatening or dire, otherwise one would think she would call 911 and/or show some sign of alarm as she was stepping outside, which witnesses might have remembered. it might have been something like "ZL's phone is dead, but he asked me to bring you this lunch". then he could have pulled a weapon when she got outside.
perp sounds
really dumb. reminds me of the guy who ordered a sawz-all and plastic sheeting through doordash and googled how to get an alias. or the guy who googled how to dismember a body.
seeing the suspect's and victims' CV's, i wonder if there's also some bruised ego silliness going on here, similar to the brown university shooter. seeing ZL living the life he thought he was supposed to have may have made any infatuation with NB worse and made it about pride too. though of course the brown u shooter was actually really smart, unlike this guy.
all JMO