Chief Supt Mangan, speaking to the Garda Review
, revealed one key area for the detectives is online posts.
He added: "I am now calling for a full garda review
and or cold case review into my sister's case.
A former editor of the Irish Times, he also edited the force magazine, the Garda Review
, and was a founding commissioner of GSOC.
It says so in the latest edition of the Garda Review
In an article in the Garda Review
, he said: "Due to their nature these type of attacks are a nightmare for police, as they are much harder to predict.
John Pender, 34, whose pregnant sister Fiona disappeared in 1996, said he knows who the chief suspect is and wants a full Garda review
into the case.
A Garda review
is under way into how the brute was wrongly released on bail several times leading up to the attack.
In an editorial in the Garda Review
, the GRA cited a number of reasons why six gardai were deployed to arrest the TD.
A Garda review
of the DNA evidence, announced in January, confirmed Ms Hayes was not the mother of the infant found at White Strand.
Inspector Gallagher told Garda Review
: "The hooligans typically don't dress in the team colours but sometimes wear designer clothing.
Byline: JOHN O'KEEFFE Director of Communications, Garda Representative Association and Editor, Garda Review
Mr O'Sullivan, who revealed the scandal in this month's Garda Review
, said another colleague was trying to use an interpreter over the phone while the individual was trying to barter for goods at a car boot sale.