Barnes and Little both played football for the University of Miami, and during a meeting of the football team after the murders, some of the football players indicated that Lumpkins had an ex-boyfriend named Labrant Dennis.
In an interview with police, Dennis admitted to being romantically involved with Lumpkins and fathering a child with her. Dennis told police that he and Lumpkins had had an argument the week prior to the murders when she came home late after an evening out with Barnes. At the time of the argument, Dennis and Lumpkins were living together with Dennis’ cousin and her boyfriend. After the argument, Lumpkins moved out.
Police learned that from acquaintance of Dennis, Joseph Stewart, that Dennis borrowed a shotgun and duffel bag from him. On the morning of April 13th, Dennis hid the duffel bag, which contained a black, hooded sweatshirt, black boots, the significantly damaged shotgun, and a knife, in some bushes at Stewart’s mother’s house. Upon finding the items, Stewart became nervous and threw the clothes in a grocery store dumpster and discarded the shotgun and knife into a sewer drain.
Police later recovered the shotgun and knife, as well as the duffel bag, but were unable to recover the discarded clothing. Additional forensic investigation determined that fragments of the shotgun found in the apartment matched Stewart’s damaged shotgun. The State further linked Dennis to the murders and established Dennis’ motive by introducing evidence that Dennis had stalked Lumpkins on several occasions and had once threatened to kill her with a gun.