I had the same situation about 3/4 years ago and I acchieved to record them with the mobile and I called the police during the persecution (I think I posted here the video).
Since then I use cameras at both cars.
I was going to Eze and there was a suitcase at the front seat, so, they obviously tryied to robb us.
I was with the whole family in the car so, it was a very ugly situation.
To make the first call defined everything, i was at Court as the victim and they were arrested to declare at Court and later found non guilty.
They were well known criminals who were recognized for everybody at the prosecutor’s office when I showed the video.
For the infornation of the forum members. At BA province any crime with guns means automatic jail no matter there is no f...g evidence and the trial might means 4 years of jail. This is all what I can comment as soon as you have a lawyer.
He cannot travel without permission of the judge.
However, you should worry about deportation. Even if you have permanent residency, it can be revoqued. The example I always use about the advantage regarding citizenship is, precisely, car crashs: a situation where you can get involved into a criminal case even you are not a criminal.