YES...all of this!I agree.
I think the pinging was part of the plan to mislead authorities into thinking KB had headed north. It might have been KK's particular contribution to the plan. PF is an emotional calculator; KK is a coldly rational calculator.
I think she left blood behind, but not in hopes of LE finding her. I think she left it behind as insurance if she thought PF might still come after her or her children. She could remind him that no matter what other evidence he/they had destroyed, she had deliberately left evidence in the condo. Easy to overlook, but also easy to find if you've gotten an anonymous tip. If she didn't tell him where it was, even if he could get back into the condo, he wouldn't know where to look.
jmho
especially this part..
PF is an emotional calculator; KK is a coldly rational calculator.