I have not properly slept more than four hours since I got the news," says Chris Green, Michaela's dad. "To be honest, I really don't know," Tyler answers. Michaela left once before, three years earlier when she was 17-years-old, but Tyler says that was under completely different circumstances. Houston police investigators now have Michaela's phone, trying to figure out if it can help lead them to where she is. If you know where Michaela Green is, contact the Houston Police Department at (832) 394-1840.