Bed Ridden Being Taken Advantage Of

I'm putting this out there, because something needs to be done and nothing has helped so far. 
Some acquaintance or family member, introduced this couple to a lady I know, that is almost completely bed ridden.  The couple, a man & his girlfriend, who must have been down on their luck at that time, made all types of promises to this woman, in pretext of paying some rent/bills and helping out around the house.  The woman, being gullible and in need of financial, health related, and household assistance, listened to their plight.
Being a person, who tries to help, even on her limited means, she fell for their stories.  Needless to say, this was a very bad mistake.  At first as always is in situations, like these, they did a few things to suffice and save face.  Making excuses about why they were only able to do this or that. It wasn't long before the lady, figured out, she was being used and taken advantage of.
Things came up missing, all the food was gone, no money was being offered, and attitudes were hitting the roof.  They acted as if they were running the household and would make derogatory statements, and get physical with their actions towards others in the house.  So much so, that they began to tear the actual house up.  Their mad fits, whether drug related or not, happened often, resulting in the back door, being ripped off, and physical assaults against persons, who were there.
Local police have been called, many times and they end up not seeing the whole picture, or believing the lies this couple tell them.  The lady of the house is told to evict them, if they need to leave.  Knowing this, the couple deliberately uses the utilities to extreme, in order to cause her more financial expense, and keeping her financial status drained.  She is unable to afford the filing fee to evict these criminals and be free of their meanness. 
Adult Protective Services, has been notified, and they say the same thing.  Have them evicted!  How the hell can you evict someone, who keeps you financially drained, with their actions.  The domestic violence that is going on over there is heartless, cruel and mean.  Their criminal actions, need to be punished.
I am an outsider, who knows the lady and don't like what is being told to me about this situation.  I can't do anything to help because I'm not family, and would only cause more harm.  It's a scary situation, since this man has physically attacked one person, who intervened between him and a woman, who was visiting, when the person caught him choking her.  He then turned on the other person, picked up a aluminum pipe and proceeded to beat the man, until paramedics had to be called to take the man to the hospital.  The police, were unable to get the man to let them into the house, so he wasn't arrested and got away with his mean assault on another person. 
I wonder what it's going to take to get some help for these poor abused people?  I hope it doesn't result in someone being killed.  Too much bad violence happens in Dallas, Tx and the end result is always the same........something bad happens!