I think we can stop certain people in fact I'm pretty sure we can but then questions arise at to what the criteria is and if we know . So was this a failing on the procedure or decision making i honestly don't know .
Being a member of the EU will certainly lead to issues where people like this bloke travel , whether he's responsible for this crime or not . If he's responsible then obviously it'd be a tragedy for the girls family . However I'm not sure one case , or the other 3 or four others could link , should lead to an abandonment of a socioeconomic political policy across Europe .
We have our fair share of scum in this country and personally I don't sit terrified of the foreign hordes conquering our nation . That doesn't mean I wouldn't understand any outrage or real pain the family may feel in the future if a connection is established though.
Poles dealing openly drugs in the street and stabbing each other where about mate ? Not taking the Mick genuine question as it's certainly not something I've experienced , the crime I've encountered regularly has been almost 100 % English based .