After taking the charge in the early goings of the game, the wards of Gino Minguillan continued to pounce on and posted a 13-point lead going into the final canto, 62-49.
Mike Logarta's MJDL tried to hang on, but Custom Police were determined to give lessons to its rival and won the action under the 35-above division.
MJDL, however, didn't come home empty handed as its 35-below team won its assignment over MEZ, 64-60.
In the final game of the night, Purcia Transport System thrashed Duterte Customs Brokerage, 84-77.
Randy Francia and Joseph Jayme combined for 48 points to lead Purcia.
The scores
First game
POLICE (87) - Halamana 16, Sicat 13, Rama 11, Cabahug 8, Dalucapaz 7, Ravago 6, Ignacio 5, Velez 4, Mabalu 4, Cabrera 4, Alindogan 2, Boniao 2.
MJDL (61) - Atienza 11, Dacumos 10, Dela Peña 10, Lopez 10, Commendador 6, Agustinez 6, Martinez 4, Logarta 2, Tuico 2, Chio 2.
Second game
MJDL (64) - Palero 15, Elloren 14, Villaronza 13, Gelbolengo 8, Daan 4, Moral 4, N.Medalle 2, Rasonable 2, Bandec 2.
MEZ (60) - Yap 20, Arong 13, Villacastin 7, Bensi 6, Campos 3, Cabase 3, Encabo 2, Maningo 2, Sevilla 2, Umali 2.
Third game
PURCIA (84) - Francia 17, Purcia 16, Jayme 15, Faciol 9, Cortez 7, Oporto 6, Lahaylahay 6, Alpas 2, Banghal 2, Barte 2, Pancho 2.
DUTERTE (77) - Cuyos 24, Manlosa 10, Gabisan 10, Cacharo 8, R.Mangubat 8, Montebon 6, Montero 5, E. Mangubat 4, Monteza 2.