Authorities arrived at the Peachtree Crossings mobile home park to find three victims dead from gunshot wounds, police said.
The shooting took place at a mobile home park near the city of Birmingham earlier Wednesday.
In the first accusations, a 5-year-old female victim told police at the time, in June 2005, that Lever, who was her neighbor, had molested her, documents obtained by the York Dispatch said.
'If you see this individual do not approach him, and call 911 immediately - he is armed and risky, ' Walker said in an appeal to the public.
Separately, Lever is scheduled to go on trial on sexual-abuse charges on September 11 in York County, Pennsylvania, court records show.
Gardendale police, Birmingham, Homewood, Warrior, Kimberly police and the Jefferson County Sheriff's Office have set up a perimeter.
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Police in Lower Windsor Township confirmed they arrested Lever in 2015 on child sexual abuse charges. He asked residents to remain aware, but said he has no reason to believe Lever is still in the Gardendale area.
A Lincoln Navigator included in previous vehicle descriptions has been located in Florida and is no longer suspected, Walker said. She claimed that he was stalking and harassing her and her 11-year-old daughter.
In both cases, Lever was charged with involuntary deviate sexual intercourse with a child, aggravated indecent assault of a child, indecent assault person less than 13 years of age, corruption of minors, and distribution of explicit sexual material of a minor.
Police have nevertheless urged the public for vigilance and seek any information in the manhunt that now includes the entire state of Alabama and the Florida panhandle.
"My daughter has a very different disposition when she returns home", she wrote.
A hearing in the Alabama case is scheduled for July 26, a court docket showed.