Let’s speculate on Michelle's (Liv Tyler) sister.
* Is she actually dead?
She says, she wants to give her a proper burial. Leads one to think perhaps no body.
*Is Michelle forgetting how her sister died? Or in denial?
OD ( could provide bonding fodder for her and TK as well as with the chief)
Suicide, blames her brother in law for not taking care of the sister/doesn't believe her sister was depressed.
Shrug let me know what you guys think