Motives remain unknown with several speculations. The family claims the motive for the murder was Magsino's controversial political exposé on the Batangas government. Partner Benjie Reyes told GMA News Online that Magsino was working on several possible stories before she died but did not disclose details. The topics of those stories remain unconfirmed. The mayor of Batangas denied involvement in Magsino's killing despite allegations. The NBI of Philippines, however, also were investigating a love triangle, but that motive was dismissed.
