The pensioner dubbed the 'Granny Ripper' entered details of her secret life in diaries which she kept in Russian, English and German, alongside black magic and astrological books.
She was arrested last week after being filmed by CCTV cameras near her home in St Petersburg removing the body of her latest victim in black plastic bag.
Now detectives suspect that the former hotel worker also ate some body parts she removed from the people she killed, chopping off their heads, arms and legs.
Sources in Russia's powerful Investigative Committee - equivalent of the FBI - indicated internal organs, in particular lungs, were removed from the bodies of victims.
It is also suggested the self-confessed killer gave her final victim, Valentina Ulanova, 79, an overdose of sleeping pills before dismembering her body with a hacksaw while she was still alive.
She was detained after the headless body of Ulanova - for whom she was a carer - was found near a pond on Dimitrova Street in St Petersburg.Samsonova killed her after a quarrel over unwashed cups, she told police investigating the murder.
Senior investigator in St. Petersburg, Mikhail Timoshatov, said: '
Tamara Samsonova says that at first she made her friend [Ulanova] sleep - and then cut her into pieces.'Police are now comparing her elaborate diary entries with known cases of unsolved murder cases where victims were dismembered, and body parts packed in bags strewn around the city.
A headless, armless and legless man's body was found on the same street 12 years ago, and evidence found in her flat, including a business card for the victim, links her to the crime.
The 'Granny Ripper's' diary excerpts include a chilling confession of murdering one of her former lodgers.
'I killed my tenant Volodya, cut him to pieces in the bathroom with a knife, put the pieces of his body in plastic bags and threw them away in the different parts of Frunzensky district,' she wrote.Detectives in Russia are refusing to release details of her diary until the multiple murder investigation is completed.
Amazingly, given the gravity of the charges against her, in her latest court appearance Samsonova seemed more concerned that journalists were there to report her case - and that her neighbours in St Petersberg were going to find out what she is accused of.
After being remanded in custody, she told journalists: 'I knew you would come... It's such a disgrace for me, all the city will know.'
Later she blew a kiss to reporters. When judge Roman Chebotaryov asked her to address the court, she replied: 'It's stuffy here, can I go out?'