Neighbors killed my cat!

Momo update.

This is my post on facebook about my cat being missing.

My cat, Momo never came home after going for her afternoon walk. She had been pretty sick for a long time after her surgery and antibiotics, but seemed to be doing a lot better. Now, I fear she went somewhere to pass away. That's what animals do sometimes. We haven't seen her in three days. I miss my old lady and I hope she finds peace wherever she is.

Updated post on facebook about what actually happened to my cat.  I just found out yesterday after having searched for her all this time.

I know what happened to my cat Momo now. She was feeling better and was ready for her second surgery, so I thought it wouldn't hurt to let her go lie in the sun for a while. She wandered into the empty lot next door and the neighbors picked her up that day and took her to the humane society then had her put down. She died four days ago and even though they saw us hunting for our cat, they said 

nothing until my kids went to their house to play with their daughter. They told my 3 year old and my 7 year old that they had their cat killed and buried her in their back yard.
It is taking every bit of will power I have not to go over their and beat their asses for what they have done. She was finally healthy enough to survive her second surgery and they took that chance away from her then broke the hearts of two little kids.
I love you Momo and I'm so sorry. I should never have let you outside.