Ok, so I just watched Robin's video. It's 20 minutes long so I'm paraphrasing.
She was called, anon, and the person did not speak so she thought it was her Mom. She hung up. 9 minutes later, another call, again, they didn't speak but this time, it was not anon, so she called back, no answer. Then she got a message from the same number asking who she was, Robin answered with "Your daughter". She called it again and this time, a man answered and claimed to not know what she was on about.
Later that night, she got a message from that number saying "I don't know Diane, I just want to be left alone" - Diane is an alias that Cloudia has been known to use in CA.
Short hand, she went down to CA, nearly lost her job, spent out $2000 on flights, accommodation and rental cars, this "Tyler" who claimed to know her Mom, refused to send her pictures, after Robin arrived in CA, her suddenly said his sister was in town from Kansas City. It all began unravelling, his sister and her wife became rude towards Robin and blocking her on FB. So, Robin called San Diego PD and her Mom's investigator and they contacted the sister, suddenly, she said she didn't want anything to do with it. The sisters wife is apparently a school teacher.
Basically, they know who the sister and the wife are and they are trying to identify "Tyler"... but the point is, Cloudia is still missing and Robin has been on a very, very painful journey.
I hate this for her and wish her peace.