There are several factors to consider in determining what will happen to your friend. One of the most important conditions of probation is that the probationer does not violate any laws in the State of Texas while on probation. Since your friend was arrested for a new law violation, he has, alleged violated this term of his probation. However, until your friend is found guilty and convicted of the DWI, he has not technically violated his probation. Your friend should contact his probation officer and let him know that he has a new charge pending. Being up front and honest with his probation officer may save him a trip to jail.