I lived in a place very similar to yours.
It was all fun and games until the inbred (for real) psycho next door decided to murder someone he had a beef with. He showed me his gun the night before. On the day after he told me it was a "spiritual" experience. The cops arrived later in the day, and he tried to hide in my apartment but I wouldn't open the door. He knew I was there and pleaded with me through the door, but I told him I couldn't open it. So, he was arrested.
I figured he was gonna be pissed off at me for that, and when I received a letter from prison in my mailbox, I was mortified. However, he was very nice. He thanked me for always being kind to his elderly mother who lived with him, since I always carried up her groceries for her. He also enclosed a letter he wanted me to give his mom, which mentioned the murder charge was dropped and he'd be getting out soon.
I wasn't sure what to do... On the one hand, I was on his good side because I was nice to his mom and helped her out. On the other hand, although he didn't mention it, he was arrested partly because I didn't let him into my apartment when he saw the cops. I couldn't understand why he sent me his mom's letter, instead of sending it to her directly. I did know he was a psycho though, so I resorted to the only choice I had: I moved the fuck outta paradise fast, before he could return.
Incidentally, the murder did not occur on the property. However, two shootings had occurred in my 12-unit building within the three years that I was there.
Call me a suburban sell-out if you like, just don't call me late for supper. I'm done with urban apartment buildings for good.