A dog reportedly seized by police after a 28-year-old woman was mauled to death had previously appeared on a BBC show about problematic puppy behaviour.
The 11 stone Leonburger, named Shiva, is claimed to be one of eight dogs in police care following Thursday's tragedy in Caterham, Surrey.
A woman who was walking a group of dogs died as a result of her injuries.
A second woman who suffered dog bites has since been discharged from hospital.
Armed police were called to the scene, while locals said they saw a helicopter searching for dogs who scattered after the attack.
Shiva had featured on BBC2 programme 10 Puppies and Us - which told the story of young dogs with behaviour issues.
Owner Delia Lewis told viewers in 2017 that her pet was originally named Maple, but she decided to change it as this sounded "too sweet".
Instead she opted to name the dog after the Hindu god of destruction.
Ms Lewis said at the time: "I thought Maple is far too sweet a name for this dog.
"I mean, don't get me wrong, she is sweet, but, like, she's not that sweet."
Shiva has since been described as a "giant girl" with "the sweetest nature ever", the Mail reports.
Details about the incident remain scare, and it is unclear whether Shiva was responsible for the fatal injuries inflicted on the victim, who has not been named.
In the aftermath of the incident, Ms Lewis reportedly said online that Shiva was now missing.
Other dogs seized by police are reported to include two dachshunds, a cockapoo and a collie.
A horse rider who arrived at the scene told the Mail: 'The dogs must have been on the lead because they were in such close proximity.
'I don't know why they kicked off the way they did. Maybe a couple were fighting with each other and she tried to intervene, and she got in the way and they saw red and just kept going."
The witness said the woman who later died shouted: "Turn back, turn back!".'
Detective Inspector Josephine Horner, senior investigating officer, said: "This is a tragic incident where a young woman has sadly lost her life.
"Our thoughts remain with her family and friends and the family have asked that their privacy is respected at this difficult time.
"Specialist teams have been carrying out forensic work at the scene but this has now been completed and the area has re-opened to the public.
"I know this incident has caused real concerns locally and officers from the local neighbourhood team will be out in the area to provide reassurance for residents.
"The investigation to establish the circumstances around this incident continue and I urge anyone with information who has not yet spoken to police to contact us."
Richard Bream, who runs the nearby Mardens Kennels, told the PA News Agency he had never heard of a dog attack in the area before.
He said: "That particular area, View Point, is an area where professional dog walkers will turn up in their van and take the dogs out and walk them.
"I've always felt you see some of these dog walkers have five or six, and they shouldn't be able to do that."
A woman walking a border collie past one of the police cordons, who asked not to be named, said she was shocked by the incident.
She said: "It's a nice circular woodland walk and we've never had any issues before. It is so shocking, normal dogs surely wouldn't do that."
A man at an address near the scene, who asked not to be named, told the PA News Agency the beauty spot was very popular with dog walkers.
He said: "The dogs dispersed into different areas of the woods and the police helicopter was out looking for them."
A post-mortem examination will be conducted by the Surrey coroner as part of an inquest into the death.
