Now…
They might not have all these fancy Hospital Services, plus the majority of nurses only treat self inflicted cases like diabetes from alcohol or cancers from smoking.
However, they still know the psycological profile of a captured killer in a scenario…involving money.
A smart criminal with perfect home routines to cover up a murder may trick the police, but if there is a dead body in the same house she will know about it.
Meaning, she would find the dead body in the rich house based on the local Hospital Psychological Profile Book.