If charges hve been fied, counsin should have an attorney. Best source of information about the status of the case will be with that attorney as he/she would have all of the reports including witness statements.
The above is not intended as legal advice. The response does not constitute the creation of an attorney client relationship as this forum does not provide for a confidential communication.
Your cousin should hire a good criminal defense lawyer at this point.
Here's why. Your cousin is accused of a very serious offense. Because of that, his credibility will not be good with the police. And, as a general rule it is a very bad idea for the accused to discuss the charges with the police anyway. There's an old saying, "Not many fish get pulled out of the lake that don't open their mouth first."
A good criminal defense lawyer can deal with the police and prosecutor for your brother if it comes to that.
Also, keep in mind that a 16 year old is below the age of consent in Texas, and to have sex with a 16 year old is still a crime. There is a defense, however, if the two people are no more than 3 years apart in age and both consented to the sex act. If that does not fit your cousin's situation, even if all you say is true, and the sex was consensual, he could still face charges for a serious felony.
And, if the prosecutor finds the alleged victim out of state, they might well fly the person back to testify. Not out of the woods just because the alleged victim moved.
So, again, your cousin needs the help of a good criminal defense lawyer NOW.
Answers on Avvo are for general information purposes only and should not be relied upon as legal advice. No attorney / client relationship is created by providing this answer. For specific advice about your situation, you should consult a competent attorney of your choosing.
Surely your cousin has hired a criminal defense attorney, or had one appointed, right? If not, get one NOW. If so, bring all of these questions to that attorney to discuss. Many times, prosecutors will dismiss cases where victims disappear, but sometimes they do not.
In no way am I offering you legal advice, and in no way has my comment created an attorney-client relationship. You are not to rely upon my note above in any way, but insted need to sit down with counsel and share all relevant facts before receiving fully-informed legal advice. If you want to be completely sure of your rights, you must sit down with an experienced criminal defense attorney to be fully aware of your rights.