Find professional help on cleaning and who is responsible
Steps to do after tenant's death
https://rentalsinboise.com/property-management-blog/what-to-do-when-your-tenant-turns-up-dead/
https://trepryor.com/blog/landlord-strategies-when-a-tenant-commits-suicide-or-an-unattended-death/
At least your landlord insurance could cover remediation, biohazard or loss of rent, etc.
Perspective from a survivor
