Filmore was 8 of 11 from the field and hit all seven of his free throw attempts.
Curtis Jones led Langston (2-2) with 25 points. Karon Abraham had 15 and Daniel Mulamba 13. Langston, a NAIA member, out-rebounded SE Louisiana 37-29.
Andrew Guillory scored nine points and Zay Jackson had seven during SE Louisiana's 20-3 run to close the first half for a 10-point lead.
Jones scored seven points in the first 5 minutes after halftime as Langston used a 13-7 run to get within 57-53. Later, SE Louisiana's lead dipped to 64-61 but Filmore scored four during an 8-0 run to lead 72-61 with 11:25 left.