Court documents show that in 2008, Alonso sold an undercover federal agent and an informant $9,970 in counterfeit bills for $400.
He was arrested in March after being indicted in February after serving a five-year sentence for his role in a 2001 scandal that sent innocent immigrants to jail using faked drug evidence.
A former narcotics officer, Mark Delapaz, went to prison after his conviction in the scandal.
