DALLAS — Authorities said Friday that a convicted steroids dealer who claimed to have sold drugs to pro football players killed himself, and the mother of a woman found dead in his home said she believes he killed her, too.

The Dallas County medical examiner ruled 35-year-old David Jacobs’ shooting death a suicide, but police in the Dallas suburb of Plano aren’t saying whether he shot his on-again, off-again girlfriend.

Both bodies were found in the master bedroom of Jacobs’ Plano home. He was shot in the abdomen and head, and 30-year-old Amanda Earhart-Savell was shot several times. A .40-caliber Glock was found next to Jacobs, police said.

Police said until they receive the medical examiner’s final report they can’t explain how Jacobs killed himself.