In 2017, Fabio Sementilli was stabbed to death at his Woodland Hills, Calif., home. His wife Monica and her ex-lover were charged with conspiring to kill him.
In an exclusive interview, Robert Baker tells "48 Hours" Monica Sementilli "did not know" about the murder and had no involvement. Baker's testimony could help Sementilli in her upcoming murder conspiracy trial.
Intercepted love letters and surreptitious recordings between Monica Sementilli and Robert Baker allegedly reveal secrecy pact, coded language and sex games inside jail.
