Sebastian, 15, who has medical conditions such as autism, was reportedly last seen on February 25 in Hendersonville, Tennessee, as his mother was putting him to bed.
The FBI is investigating the case with assistance from the Bureau of Alcohol, Tobacco, Firearms, and Explosives and the Alabama Law Enforcement Agency.
Wilson, 30, will learn his fate Tuesday, for the 2019 fatal strangulations of Cape Coral, Florida women Kristine Melton, 35, and Diane Ruiz, 43.
Police said suspect had three rifles, a pistol, and a machete. A Louisiana man armed with three rifles, a pistol, and a machete threatened and harassed a school bus driver as well as the parents during a drop-off Friday morning.
