Pongpat was initially given a five-year term, but the court later halved it because of his useful confession.
Pongpat, 59, has been given a jail term of 31 years and nine months in five cases (collecting bribes from promoted police officers; collecting bribes from oil smugglers; being involved in a gambling den; money laundering; and violating the Forestry Act).
The latest sentence has raised the total sentence to 33 years and three months.