New York (CNN) -- Investigators are trying to determine what set off a Long Island man who was killed in a standoff with police after he crashed his pickup truck into a utility pole and then fired on responding paramedics.
After the shootout Tuesday night, police discovered an arsenal of semi-automatic weapons in his vehicle, including six firearms and several rounds of ammunition that were strapped to his body, according to Nassau County Police Lt. Kevin Smith.
"If this guy had decided to walk into an establishment with multiple people, he could have created a disastrous situation," Smith said.
The man had a .32-caliber pistol in his pocket, a .357 Magnum revolver on his lap and a hunting rifle strapped to his chest, Smith added.
He also had a .22-caliber pistol, a rifle and a TEC-9 handgun in the passenger seat of his truck and a cartridge holder filled with ammunition attached to his forearm.
Police say the man used the rifle to fire at Justin Angell, a 20-year-old Bellmore Fire Department paramedic who responded to the accident.
Angell collapsed in a nearby yard after being shot by the gunman, according to Bellmore Fire Chief Robert Taylor. Angell was rushed to Nassau University Medical Center and is listed in stable condition.
The gunman, whose name has not been released by police, was killed soon afterward during a shootout with three police officers who came to the scene of the crash, Smith said.
Nassau County Police Commissioner Lawrence Mulvey said police are still working to determine the man's motive.
"It appears that he may have had some domestic issues," Smith said.