My Daughter's Sanity and Safety

I haven't heard from the youngest daughter in over four weeks. Only an email a week ago which said "Hi mom". She is not answering phone calls or emails from any of the family or her friends. A couple of friends have stopped by her house and she doesn't answer the door. The way her condo is arranged there is a gate and you can't get to the door but have to use a call box...which isn't working. She is totally incommunicado. Needless to say, I am worried...her sister is worried...her good friends are worried. I can picture her inside drinking...or passed out.
Rumors are that she doesn't have any money...that the house is in foreclosure...I know that he didn't have any life insurance. Her business failed because she was so busy running him to the doctor and hospital that she couldn't take care of the business. She, of course, has denied that she has financial trouble...but she has had trouble with the truth lately...and I don't know quite what to believe. So tonight my brother and I drove 35 miles to her house and it was dark and the car was in the garage but the dogs didn't make any noise. It is likely she wasn't there. Tomorrow, her husband's exwife is going over there with the police and a key to check and see what is going on. She told a friend she was moving to Dallas this weekend. I don't know what to think. I have begged her to just call and let me know she is ok. I even explained that worry is causing me to become a little unstable. Hoping I will hear something soon. I am deathly afraid that when the exwife goes over she will find her in there dead. She has been making up background information about herself and posting it on the internet. I know she is not in her right mind. I am really concerned.... It's odd feeling like the sane one.