Media captionBBC News NI Investigations Reporter Kevin Magee is confronted by self-styled paedophile hunters
One of his targets last-place August was a man in County Antrim.
Two days after he was confronted, the man took his working life.
His family said they wanted to maintain a self-respectful silence.
Mr Keenan recently had a public falling out with other paedophile hunting groupings of England and, in an profanity filled video, issued various threats of physical violence against them on Facebook.
Mr Keenan diminished a request for an interview exercising his own mention and identity.
‘Absolutely disgusting’
BBC News NI approached him in western Belfast to ask him on whose permission he was meeting parties he considers it to be paedophiles.
When asked if any of his actions resembled those of a vigilante, he responded: “Are you serious? Get out of my display, leave me alone. Stay away from anybody that I have previously worked with.
“You are persecuting people, I am not here to answer your questions. You are perfectly disgusting. Get out of my seat right now.”
Later the same day Mr Keenan produced a group of people to encounter BBC investigations reporter, Kevin Magee, in a coffee shop in Belfast.
Mr Keenan claimed he had been able to mobilise more than a dozen people from various paedophile hunting groups.
For a short time they blocked off Botanic Avenue and produced the occurrence online.
You can see Kevin Magee’s reporting under BBC Newsline at 18:30 GMT and there will be an extended look at police investigations on BBC News NI’s Facebook page at 19:00 GMT .
Eyewitness account:
A mother-of-two has told of her horror when her residence was erroneously surrounded by a group of masked paedophile hunters.
The self-appointed organization encircled the house in the Springfarm estate in Antrim in January, claiming a paedophile was living there.
But the group had made a mistake – they had picked the mistaken house.
The 34 -year-old woman, who queried not to be referred, said she was “absolutely terrified” when members of such gang approached her home.
Her 66 -year-old mother and two young children, aged seven and three, were in the house with her.