one killer left a vital clue, a severed finger that has allowed him to be identified as 29 frempbl national. six members of his family clues his father and brother have been arrested. >> translation: he caught the attention of the police due to a violation of public power. from to 04 to 2010 he was found guilty 10 times but never imprisoned. he was black lifted due to extreme behaviour, but was never classified as part of an iljelling extremist group. >> reporter: police have found a syrian pass part at the stade de france. it was used by a rough gee in leros. another has been arrested in belgium. >> multiple arrests have been scuffed. investigations are still ongoing. >> reporter: in germany authorities say a man arrested in bavaria earlier this month with a car loaded in arms, would be a dleer >> reporter: after the attackes on the offices of "charlie hebdo," a huge crowd around here. police are still worried about security. investigators say attacks were part of a well coordinated cross-border operation. they're now looking beyond france for more clues. this colorful city is struggling t