The boyfriend of a pregnant teenager who disappeared in 2012 has been indicted in her murder, Florida police announced Monday.

Morgan Martin, 17, was four months pregnant with a baby girl named "Jaliyah" when she disappeared from her home on July 25, 2012, wearing only pajamas and slippers. 

Martin, of St. Petersburg, told her family she was going meet with the baby's father, then 24-year-old Jacobee Flowers. That was the last time anyone heard from Martin, and her body has never been found. 

St. Petersburg Police Chief Anthony Holloway announced Monday that Flowers has been indicted on a first-degree murder charge in Martin's disappearance, Fox affiliate WTVT reported. 

Martin had previously identified Flowers as the father of her unborn child, but after her disappearance, he downplayed their relationship and denied being the father, according to the station.  

"He duped her into coming out to meet him, he killed her and then dumped the body," Holloway told reporters during a press conference Monday.

Holloway said detectives had pursued leads through the years, but "everything continued to point to Flowers."

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