Macron's ex-security aide Benalla in custody over diplomatic passport use

 Alexandre Benalla attends a hearing by senators on September 19, 2018 in Paris after a video showed him wearing police uniform while attacking protesters during May Day demonstrations.

Paris (CNN)A former security aide to French President Emmanuel Macron has been placed in custody as part of an investigation into his use of diplomatic passports, the Paris prosecutor's office told CNN on Thursday.

Alexandre Benalla was fired from Macron's office in July last year after being filmed beating up a May Day protester.
He is currently under investigation for the "illegal use of a document certifying a professional position" and "forgery and use of forgery," the prosecutor's office said.
    Macron's chief of staff, Patrick Strzoda, on Wednesday testified at a Senate hearing that Benalla had used his diplomatic passports about 20 times between August 1 and December 31, 2018.
    Strzoda also said Benalla had used a fake document with the letterhead of the President's chief of staff to request his second service passport.
    French President Emmanuel Macron leaves his house dressed for tennis with his then-deputy chief of staff Alexandre Benalla in June 2017.