He said the shooter was radicalized on the Internet. He suggested also that the fellow was very confused confused and claim affiliation to groups who are themselves enemies.
He was investigated for 10 months. They interview him again later for indirect connection to someone who was a suicide bomber.
He said the work investigating these cases is searching for a needle in a haystack. It is also looking which stalk of hay will become a needle.
He advises the public refrain from the urge to hate and channel their anxiety into being more aware.