ABC11 Eyewitness News was given a song that sources say was written by Ackerson's ex-boyfriend, Grant Hayes. Hayes, who also is the father of Ackerson's two children, is charged with her murder.
The song, which was never released, contains lyrics about killing his "babies' momma."
In more than a dozen videos posted online, Hayes is seen singing about love, but sources say there's another song that most people who know Hayes haven't heard until now.
The song is called "Broomstick Rider" and ABC11 learned Hayes wrote the song about Ackerson. The song is about the couple's troubled relationship.
The following lines are from the chorus. "My babies momma, don't talk to me. Don't want your drama. I got two kids by you; I can't take anymore from you."
The song continues with lyrics about their custody battle. "I would wake up every morning hoping one of us would go, but not me 'cause I'm paying the bills. Find another Sugar Daddy and a wallet with bills 'cause I know that you will when you finish trying to take my kids (unintelligible) that's how you is..."
The song also seems to include a warning for the young mother. "And then she wants me to pay her. You've lost your da-- mind. I put a price tag on your head. That's right. You must have told your attorney I got intentions on killing you. What? (unintelligible) Might stop me, but my bullets will get you soon. I've got my goons from way back. They still owe me money, told them you stayed at my mom's crib. Now ain't that funny?"
Authorities believe Hayes killed Ackerson, dismembered her body and disposed of her remains in Texas. His wife, Amanda, also is charged in connection with the crime. Amanda recently gave birth to the couple's first child together.
ABC11 spoke with Ackerson's brother Jason about the song Friday.
"It truly shows his character and how he's felt for a long time. He finally got up the nerve to go through with it. It's verbatim of the threats Laura told me about," he said.
But Jason Ackerson said he wants to focus on the positive.
"Let's focus on how good and sweet a person she [Laura] was dedicated to work and children and an awesome mother. Going to the Lord and finding comfort in him helps ease the pain," he said.