This is a direct quote from the article
"Taking a closer look, Padellaro said he saw a plastic gun carrying case in the car, right behind the driver's seat. He immediately called for backup.
Perron was ordered out of the car and a red and black switchblade was found in her pocketbook, he wrote.
He then asked Perron if there were any more weapons in the car and she said, "Yes. In the trunk." She also told police she was unsure if Burgos, her boyfriend and the car's owner, had a valid license to carry firearms."
So whether we like this incident or not, It was textbook on articulating reasonable suspicion to probable cause, That lead to good questions that resulted in a search, That lead to an arrest.