The specter of an alleged murder now casts its shadow not just on a family but on a Cohasset home — rendering it “unrentable,” claims the landlord in a recent lawsuit. Peter Capozzoli, who bought the home in 2019, is taking legal action against Diana Walshe, mother of accused murderer Brian Walshe, for damages stemming from the case surrounding the death of Ana Walshe, Brian’s wife. CBS Boston reports that Diana rented the home in March 2022, with a lease extended through February 2023, under the pretense of recovering from an illness.