The suspect was a 33-year-old Sudanese man who had obtained the refugee status and a ten years visa in 2017.[2][3] According to Arabic-speaking witnesses, he shouted "Allah Akbar" when he launched his attack and, at the time of his arrest, kneeled down and recited the Shahada, the Muslim profession of faith.[4] A terrorism investigation was launched. Searches at his home revealed handwritten notes complaining about living in a "country of disbelievers".[5] On 8 April, he was indicted for "assassinations and attempted assassinations in connection with a terrorist group".[6]