Trying to find help for a disabled man getting screwed by his landlord

Hi everyone,

One of my neighbors is in his 60's and disabled (missing an arm). He lives in a rental property that is basically a slum. It's a 500 sq ft shotgun house from the 40s that is in an advanced state of rot and decay.

The house has a water leak, rotted side boards, crumbling foundation, and I can occasionally smell urine and sewage coming out of the house from the street when walking by. I can't believe the house hasn't been condemned.

I found the landlord, but he's totally contempt to rent out this god awful house.

I contacted the city through 311, but they just fine him for grass being too long.

I'm no expert, but it seems like there should be some minimum standard of what the landlord is allowed to rent, or some form of "tenant's rights" that force the landlord to fix up the property. At least make it safe to live in.

The tenant is very poor, and refuses to get help himself. I'm trying to find groups or legal entities that will advocate for him, or at least put some pressure on the landlord to do something other than mow the grass once a month and watch this dude live in his slum.

Does anyone know other groups I can reach out to that will advocate for the tenant?