[TomGuy]

and she says Pia would not have taken her own life.

How would Sis know that, since Sis apparently had no contact or attempts to contact Pia for at least 6 years?

The other strange thing is the neighbor maintaining the lawn. Why would that not raise suspicions by the neighbor? Was he/she getting autopayments to keep the lawn mowed?

[Bigg Red]

The other strange thing is the neighbor maintaining the lawn.

***
Neighbors knew that she traveled a lot. If the yards are not large, it is not strange that a neighbor would just keep on going into her yard as he was doing his own. Just being neighborly and also keeping his neiborhood from looking messy.