[In Progress][46K][Psychological Mystery Thriller] Debt's Paid In Blood

I am looking for a critique of my first book. It is about Freshman move-in day at Stephen F. Austin University takes a gruesome turn when a faculty member is found murdered, leaving behind a cryptic message scrawled in his own blood: “We paid the price, now that you have returned. So will you!” Thrown together by the horrific discovery, four students—Jason, Roman, June, and Ashley—realize their connection is no accident. Their surnames match the families who built a local empire on a brutal 1910 betrayal in the Alazan Bayou. Now, an ancient, vengeful spirit with a "kerosene heart" has returned to collect a century-old debt from their bloodlines.