His fellow troopers and law enforcement officers honored the 27-year-old with a walkout and a rousing round of applause as he left the hospital on Friday afternoon.
"I'm feeling good," he told the crowd before being loaded into a waiting SUV. "I'm going home."
Mascia is a hometown hero and his community was there to see him get released.
"While we are angry beyond words of what was done to him, we're also extremely grateful that today he is going home," said NYSP Captain Timothy Gleason. "Today, Tom's New York State Police family and the larger law enforcement and public safety community are here to honor him and show support for him and his family, and we remain with them throughout his recovery, and we will always be by their side."
It all started when Mascia pulled over to help what he thought was a stranded motorist but police say that driver opened fire and shot Mascia in the leg.
It happened on the Southern State Parkway around 11:45 p.m. in the westbound lanes near exit 17. The gunman got away in a late model black Dodge Charger that had a temporary New Jersey license plate 997636T.
Mascia was able to take cover before retrieving his first aid bag and tending to his own wounds.
A fellow trooper who responded to the shooting helped rush Mascia to the hospital where he had surgery on his leg.
His childhood friend from high school and Molloy College, Joseph Monez, who is also a Nassau County police officer, brought his two young sons on Friday to support Mascia.
"I've known him for years and seeing him healthy and hopefully he's going to have a good recovery and get his career back on track, very smart individual and very good representation for the state troopers," Monez said.
Mascia's other friend, Nick Bidic, also didn't want to miss the moment.
"Thankful, as I said, it could've been way worse, never really thought that it could be hitting this close to home," Bidic said.
A neighbor told Eyewitness News that it's not the first time Mascia was injured. He was previously hit by a car while working.
"He's a great kid, a great guy, just always been so kind. He helps us shovel the snow and just he's so kind and caring," said neighbor Diane Sherin. "We're all praying for him."
The NYPD and other law enforcement agencies were alerted of the vehicle possibly fleeing into New York City, but it was not immediately located. As of Friday, the suspect remained on the run.
There is a $15,000 reward being offered for information that leads to an arrest in the shooting.
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