This is serious, and it can affect his release date, but it depends on how the escape is handled.
Walking away or escaping from a halfway house is still considered an escape from custody, even though it is a lower security setting.
What could happen:
If treated as a minor violation:
If treated seriously (which is common):
About the court date (9/15):
That hearing will likely determine:
Important reality:
With less than a month left, courts sometimes take a strict view because:
Bottom line
He might still be released near his original date if it is handled lightly, but there is a real chance his release will be delayed or additional time added. The court date will be the key moment that decides it.