Louis went missing from Allentown,PA on June 7,1984. He had told his parents,a teacher and school councler that he had been molested only 6 moths before his diappearence. He said his assalints names were Frank and Elizabeth but he did not know there last name. Although police ruled him out as the abductor a man named David Riggs acting as a "PI" investigated the case until it was learned that he had been arrested for attempted abduction of other boys. Further research revealed that his claims that he had "looked" for other missing boys under the name of his search group called Search Seven were bogus. It did not exist.
He also was not licenced as a PI. This guy just took advantage of the Mackerley's grief. Police were unable to make a molestation case against Frank and Elizabeth because of the lack of a last name or address. someone reported seeing Louis speaking with a man and a woman in a park shortly before he disappeared. It has been 25 years since the 7 year old went missing. The case was reopened in 2004.
Louis Websleuths thread
Myspace for Louis