The Bureau of Alcohol, Tobacco and Firearms arrested a woman who investigators say owned the gun used in the Club Blu shooting.
Jazmin Barron, 33 faces charges of knowingly making false representation in federal firearm license records and knowingly making a false representation during the acquisition of a firearm.
"One of the firearms that was recovered after the shooting at Club Blu was purchased by Ms. Barron," ATF Supervisor Michael Coad said.
Shell casings matching Barron's gun were sprinkled throughout the scene.
Barron is charged with falsifying the forms used to buy the gun from Gunsmoke and Lead in Lehigh Acres by lying about her address.
ATF said they're not sure if Barron is directly involved in the shooting.
"ATF has a slogan: Don't lie for the other guy. This is where we have individuals that tell somebody, or have somebody go into a gun dealer, or license and purchase a firearm, not necessarily for them, but for the person on the outside," Coad said.
Barron was released on a $25,000 unsecured bond.
No one answered the door when Four in Your Corner's Lisa Greenberg stopped by.
Law enforcement is urging anyone considering buying a gun for someone else to rethink that decision, adding they're never used for legal purposes.
ATF said the gun shop is supposed to verify information used to buy a gun, and they're investigating whether or not Gunsmoke and Lead, where Barron bought the gun used in the shooting, has any fault.