Randy Gross was arrested on Tuesday after court documents revealed he had taken donations that belonged to the Brookelyn Farthing Reward Fund.
The documents said Gross took a total of $263 from December 4 – 6, while promising donators their money would go toward finding the missing teen.
Brookelyn Farthing disappeared in June.
Gross said he confessed to keeping the money because he was threatened by a detective.
He said he had always planned on giving the money to the family.