Sergio mentioned they all took showers. Does the curtain in the car connect to any of them?
Who all took showers? Everyone? Who changed clothes? Did Isa? I guess they must have found clothes in other parts of the house for her because nobody touched her dresser. No latent Prints found.
Ye, the curtain might if the stains were hair dye which they applied to change her appearance since they were spiriting Isabel out of the country. ((I don't REALLY believe this, I'm just putting it out there.)))
((( Just an aside. Friend of mine had to have her tenants evicted for not paying rent. In their apartment, amongst a whole heap o' junque, she found a letter or statement from CPS or DCFS with concern about a child's hygeine, as he or she was wearing the same clothes to school day after day.)) IMO, big stress on the showers. Big stress on the hair braiding.