Adel Kermiche - aged just 19 - was on the authorities' radar.......Born near Rouen, he was raised in a housing estate in Saint Etienne-du-Rouvray - a suburb of the Normandie city.As the years went by, Kermiche became radicalised with his family alerting authorities. He was stopped in his attempts to go to Syria on two occasions in 2015: First time in germany in March last year, using his brother's passport. He was sent back to France and placed under judicial supervision.And then a second time, just two months later, he was arrested on the Turkish border using his cousin's ID - and charged with conspiracy to commit a crime with a terrorist organisation,Kermiche was sent back to France once more and detained until March 2016.He was released wearing an electronic tag, which he was wearing at the time of the attack.His involvement came as no surprise to those who knew him.SOT, Redwan, Adel Kermiche's neighbour"I saw him last Saturday, in the centre of Rouen. He was wearing a robe. And this morning, I'm working you know, I was told that an attack occurred and I knew it was him, I was sure.......WHITE FLASHHe said to us 'yes, I tried (to go to Syria). I went through Switzerland but I failed, then I tried by Turkey and they pushed me back.WHITE FLASHThen we tried to bring him to his senses, every time we did it and every time we did it he was bringing in a verse from the Quran, he was inventing things. He was saying that we should go there (in Syria) and fight for our brothers."Police raided the home of Kermiche's parents on Tuesday.The other suspect is yet to be identified.Before they killed Father Jacques Hamel, both assailants pledged allegiance to Islamic State, which claimed responsibility for the attack.