Holy shit, intelligence / justice fail.
The guy arrested for the shooting in Paris yesterday has quite a record.
In 2005, Karim C. was convicted to 15 years in prison, for attempted triple homicide. This happened in 2001, when he was being chased by the police, in a stolen car. He crashed into another car, in which sat 2 borthers, of whom one a police academy student.
He then proceeded to flee on foot. When the 2 brothers persued, and caught up with him, he shot them both in the chest with a revolver.
Not long after that, he was arrested. Two days later, he managed to steal the gun of a police officer who was transferring him to another cell, and shot him multiple times, grieveously injuring him.
Skip forward in time, apparently he has been released early (EDIT: or perhaps not, since he was apprehended in 2001 already), to 23 february this year. His messages on Telegram, indicating he wants to kill police, and in which he is inquiring into acquiring a firearm, leads to him being apprehended and charged. He was then cleared by the court for lack of evidence, and released again.
Which allowed him to pull up next to a few police vans in Paris, and open fire with an autumatic weapon, killing one officer, seriously injuring 2 more, and lightly injuring a tourist, after which he was shot dead.
Not much later, IS claimed the attack, yet named the assailant 'Abu Yussef el Belgiki'. This puzzles the intelligence agencies, and makes them suspect there might be an accomplice who is still at large, for Karim C. was not a Belgian, he was from Paris itself.