Aaron Joseph arrives for his court hearing at Kirklees magistrates court, Huddersfield.
David Ellam, 52, was heard screaming for help as he was mauled in the street by the five-year-old female dog Alex which belonged to his upstairs neighbour Aaron Joseph, 30.
Mr Ellam was walking his Yorkshire terrier Rolo when he was set upon by the snarling animal which had dug its way out of a pen erected by its owner in his back garden, a jury heard.
The worried school lollipop man and his partner had previously raised concerns the pooch – already the subject of a dog control order – was a banned pitbull breed.
Officers went to Mr Joseph's home in Huddersfield, West Yorks, and seized the dog for investigation but returned it to its owner.
Leeds Crown Court heard the animal had attacked three other neighbours and a council workman.
In 2012 Mr Joseph – a postman - was told to comply with a dog control order demanding it be neutered, insured and micro-chipped.
But it is alleged by the prosecution he ignored all the terms of the order.
Mr Joseph denies being the owner of a dog that caused Mr Ellam's death while dangerously out of control.
Richard Walters, prosecuting, said neighbours heard Mr Ellam shouting "help me, please somebody help me", when the dog attacked him on August 15, 2016.
"Alex had hold of him by the arm," Mr Walters said.
"She was panting and scraping her paws on the ground.
"She then bit his leg and Mr Ellam's cries for help were becoming more desperate."People could see there was a lot of blood.
"Alex was growling and snarling and Mr Ellam was heard to say he could not take much more.
"Ominously his cries became weaker and further apart.
"He fell unconscious and the dog was now dragging him.”
Neighbours called police who turned a fire extinguisher on the dog to force it to release Mr Ellam who died later in hospital.
He had previously complained the dog used to watch him and may be a banned breed – prompting police to seize it while they investigated.
But they returned it the week before.
A council dog warden also visited Mr Joseph five days before the fatal attack, the jury heard.
He had given Mr Joseph 21 days to comply with the terms of a dog control order and sent him a voucher to help with the cost of having the animal neutered.
Mr Walters said Mr Ellam's death was "entirely avoidable" and "caused by the behaviour" of Mr Joseph.
The trial continues.