Joseph Borrelli, veteran NYPD detective and ‘Son of Sam’ sleuth, dead at 93

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Joseph Borrelli, veteran NYPD detective and ‘Son of Sam’ sleuth, dead at 93

Veteran NYPD Det. Joseph Borrelli — the “Son of Sam” sleuth who put the Big Apple serial killer behind bars — died this week, The Post has learned. He was 93.The Brooklyn-born former NYPD Chief of Detectives suffered a brief illness before he died Wednesday, surrounded by his family.Affectionately known by his loved ones as “JoBo,” Borrelli had an illustrious career with the NYPD that spanned nearly 40 years — and saw some of the biggest cases the city’s police force ever grappled with.Borrelli was at the forefront of the investigations into the 1988 assassination of police officer Edward Byrne, ..