en.wikipedia.org/wiki/Ottis_Toole

This sentence is inaccurate in two ways:

1. The timing is wrong. A 1984 UPI report says Toole was already serving 20 years for burning down two abandoned houses in May 1983. That directly conflicts with saying he was arrested for this arson case in April 1983.
2. It was not just one arson incident. In the Florida Supreme Court brief from Toole v. State, the record states that a witness was serving time for two second-degree arson convictions and that "Toole also pled guilty to the two arsons and is serving a twenty year prison sentence."

So the article's wording compresses the case into one April 1983 arson incident, but the cited records describe two arson convictions arising from fires in May 1983.

This phrase gets Toole's custody status wrong.

Contemporary reporting from November 18, 1983 says Toole was "awaiting trial in Jacksonville on unrelated murder and arson charges"—not imprisoned for two murder convictions. A later A&E reconstruction of the case likewise says Toole was jailed while facing arson charges when he first told an investigator in October 1983 that he had killed Adam Walsh.

The court record in Toole v. State is consistent with that: it says detectives interviewed Toole at Lake Butler while he was there for an unrelated offense, and the record elsewhere describes him as serving a 20-year sentence for two arsons. In short, in October 1983 he was in custody on arson-related charges/convictions and a pending murder case, not "imprisoned for two unrelated murders."

Reliable sources identify Ada Johnson as 19 years old.

• The U.S. Department of Justice's National Institute of Justice lists Ottis Toole's confirmed homicide victims and gives "Ada Johnson, 19."
• Biography.com likewise says Toole was indicted for the murder of "19-year-old Ada Johnson."

That means the page's description of her as 20-year-old Ada Johnson is inconsistent with the better-sourced age reported by these references.