A former corrections officer admitted Monday that he orchestrated two different scams, including a cryptocurrency scam, that targeted first responders and cost his victims more than $600,000, federal prosecutors announced Tuesday. John DeSalvo, 47, of Linwood, pleaded guilty in Newark federal court to two counts of securities fraud, according to a statement from the U.S. Attorney’s Office District of New Jersey. DeSalvo created a a digital token he called Blazar Token in 2021 and marketed it on social media to police, fire personnel, EMTs, and other first responders with the promise that it wo…