<human>: Can you summarize the given text in a few sentences?

I live in a pretty small one-bedroom apartment, and my next door neighbors are a family of two parents in their 40s with a 12-year-old son living in a mirror image of my apartment. I barely have enough space for my stuff, so I can't even imagine what it must be like to fit a family of three in there. Still, it doesn't seem to have been a problem for them until a few weeks ago, when the parents started having extremely loud fights where the mom would be screaming (in a foreign language I understand a few words of, so I don't really know what about) for up to an hour, then stuff would quiet down.

The problem is that in recent days, the intensity of the fighting has increased to where I feel my walls and floor shake when they fight, which suggests to me that they're slamming stuff around. The sounds are correlated with the mom's screaming, so I'm worried she's either getting hit or hitting her husband or their kid or something. The kicker is that the kid actually called the cops on his parents a few weeks ago (I heard the interaction through my thin walls) because he was scared, but nothing ended up happening. I called the police too a few days ago because the screaming was worse than it has ever been, and I heard very distinct slapping/punching noises and the mom was screaming/sobbing "why???" over and over again. I feared for her safety, so I made the call, but again, they didn't arrest anyone.

I get that people fight. I also don't want to interfere with other people's personal affairs. But I really do worry that someone will eventually get hurt in this situation. And not that this is anywhere near as important as my neighbors' safety, but the blood-curdling screaming and slamming against the walls is getting pretty old, too. **Should I talk to them?** Slip a flyer for a local domestic violence support group under their door? Keep calling the cops? Talk to the landlord? I'm at a loss, especially when I think about the poor 12-year-old kid who has to hear this almost every night.
<bot>: My neighbors scream at each other almost every night, and I'm worried that it's becoming violent and someone may get hurt. Police have been involved, but with no outcome. What, if anything, can a concerned neighbor do?