The 23-year-old woman thought it was odd that the afternoon delivery bag was unstapled, Capt. Darrin DeWitt said, so she approached the 2016 black Ford Explorer parked out front.
That's when "she observed him masturbating in the front seat," he said.
City Detectives Robert Ghirardi and Michael Keonig investigated and identified the driver as Vinicius Porto, 23, of Newark, the captain said.
They arrested Porto, charged him with lewdness and released him pending a court appearance.
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ALSO SEE: A Hackensack mother who blocked a lane of traffic while dropping her child off at school Monday morning bit a police lieutenant on the neck, punched a captain in the chest and kicked a third officer before being subdued, authorities said.
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