Murder Games: The Life and Death of Breck Bednar was broadcast on BBC Three on Tuesday, 26 January, 201
Breck Bednar was killed in 2014 after being groomed and tricked by Lewis Daynes, 20.
Daynes is serving a life sentence.
The mother of a 14-year-old boy murdered tragically by a man he met while gaming online has said she has “no doubt” a person who has contacted her online is her son’s killer.
Breck’s mother Lorin LaFave said: “It’s very distressing and I know it’s him.”
The teenager from Caterham in Surrey, was groomed for months, then lured to his death after travelling to Daynes’s home in Grays.
There was sexual activity between the pair and Daynes had slashed his victim’s throat, as per the trial.
Daynes was sentenced to life with a minimum jail term of 25 years.
Ms LaFave, said she had been sent two online letters purporting to be from Daynes – one sent in November; the other this week in the run-up to a BBC Three television programme.
She said: “The first one came on Thanksgiving, with Daynes knowing I’m a family person and we would be having a big get together.
“I had a lot of contact with him when he was gaming and I can tell the way he speaks and have no doubt it’s him.
“If he hasn’t done it directly, he’s had someone do it on his behalf.
“We need someone higher in authority to help and find out where this was sent from.”
Essex Police said it was investigating the two online postings.
A force spokesman said: “The police have been made aware of a second letter purporting to be from Lewis Daynes that has been posted on the internet.
“The police service is considering if any offences have been committed by the publication.”