French Knife Attacker Was Muslim Convert

I have to say that I'm completely gobsmacked to learn that the French police IT worker that stabbed four co-workers to death had recently converted to Islam. Per the article:

     Michael Harpon, 45, caused the bloodbath in the French capital's historic Police Prefecture, next door to Notre Dame Cathedral.

      Investigators have not ruled out a possible terrorist motivation for the Thursday afternoon attack, which left a woman and three men dead. 

      All were repeatedly stabbed by Harpon, who had worked in the IT department at the Prefecture since 2003, in the worst loss of French police lives in a single day since World War II.

     Harpon had recently been reprimanded by his female boss over his refusal to interact with women, Actu17 reported.

Also:

      Harpon originally attacked three male officers in two offices on the first floor of the Prefecture, and then took his knife to two females – one died, and another was seriously injured.

     None of Harpon's victims have been identified by name. 

     A ceramic knife would not have activated metal detectors, and Harpon would not have been searched.  

     Harpon worked directly to the Directorate of Intelligence of the Prefecture of Police, or DRPP.