http://en.wikipedia.org/wiki/Fehriye_Erdal
keep in mind,it is proved that she has killed Ozdemir Sabanci. (By the way, Sabancis are richest family of Turkey and the owner of Sabanci Holding, namely Sakip Sabanci ,was on the list of the world's richest 100)
the reason why Belgium let her is she didnt use a quite aoutomotic gun but a semi automatic gun, as you will see if you read the source that i gave.