Ruben Estrada, 46, of 1 Bennett Ct., Copiague, was charged with attempted murder, assault, unlawful imprisonment and possession of a dangerous weapon.
Estrada's 25-year-old ex-girlfriend agreed to meet him Tuesday morning in a parking lot at Carmans Plaza, 943 Carmans Rd., Massapequa, police said. There, Estrada got into the woman's car and attacked her police said, punching her and stabbing her with a knife.
Bystanders were able to get the woman out of the car, a gray Honda CR-V with a shattered rear passenger window, police said, but Estrada then began stabbing himself in the chest.
Bystander Romann Martin, 26, of Farmingdale, said he had rushed to aid the woman. A former Navy reservist, he said he laid the woman on the pavement and applied pressure to her wounds. "I just wanted to make sure her airway was clear," Martin said.
The woman was airlifted to a hospital, police said, and Estrada was taken to a hospital by ambulance.
Estrada was to be arraigned in the hospital on the charges at a later date, police said.
With Tania Lopez
and Gary Dymski