He probably should go forward with the sentencing if his DWI is a misdemeanor. This is true because the new arrest is so recent, the prosecutors wouldn't know about it. If you postponed the case, they may find out and pull their offer. The new case sounds like one that could be dismissed if handled properly.
It is very frightening to be charged with a felony that carries up to 10 years in prison. So, it is understandable someone would panic in this situation. Eventually he will get caught and it can be even worse on him than if he simply turns himself in. If he does not turn himself in and is caught by law enforcement or a bounty hunter he could have additional charges brought against him which brings more jail time.
This depends on what the exact sentence was. If you were placed deferred ajudication you may qualify for a non-disclosure. If you your case was dismissed you may qualify for an expunction. However, if you served jail time as a sentence on this case you may not be able to seal the record.
This really depends on some additional factors but, generally you can get your license back by paying the surcharge fees at the Texas Department of Public Safety. You can find more information on their website at https://texasonline.state.tx.us.
You may be eligible for an expunction if the charge was dismissed. If it was filed as a "Class C" offense, even if deferred adjudication it can be eligible for sealing the record.
There is no requirement to shaire any informaiton with most courts. It can be either a positive or negative to your situation. You will need to consult with an experienced attorney who can review all aspects of your case and help you determine how disclosure of this information will apply to your case.
Unfortunately, we have received many complaints of a similar nature. Always have a witness if possibel to document these mechanical/software failures in the future.
There is no requirement to share any information with most courts. I can sometimes be helpful however, to disclose certain information depending on the circumstances. This strategic decision is normally one which you would carefully consider with an experienced attorney to make sure it is beneficial and not a negative on your case.