I can truly sympathize with you. My ex girlfriend had a stalker. He keyed my entire car (except the roof). Looked like 3-year old was using an ice pick as a crayon. Fortunately, insurance will cover it.
In the end, he got a nice month long stay at the grey bar motel courtesy of the LA City Attorney (mostly for stalking). I hope they catch your guy, put him in a bath tub and throw in a toaster.
2011 E93 - Space Gray - 6MT/Silver Novillo/
OE Tuning/Gruppe M Intake/ACS Springs/Vorsteiner CF Type I Rear Diffuser/Textured Matte Black Custom Powdercoated OEM 359s/Painted Reflectors/Matte Grille, Hood Vents and Side Markers/Arqray Race Exhaust/MS Pulley