How French police trapped the suspected killer Emails to the paratrooper, in which arrangements were made to view the bike, may have been sent by the gunman's brother. Detectives were then able to identify which computer was used to send the emails. Police are negotiating with the man, who has reportedly said he acted in "revenge for Palestinian children" and French military operations abroad. Two police officers were injured in exchanges of fire during the ongoing raid. The suspect's mother, who is Algerian, has been brought to the scene. Officers have confirmed that the suspect has previously been arrested in the southern Afghan city of Kandahar. A source close to the investigation said the French citizen, believed to be called Mohamed, had once been detained on a matter of common law.