When Dykes, who sources say lives in the Point Breeze area, realized the officers were onto him, he tried to take off in his white Buick LeSabre and struck two of the parole officers, nearly pinning one against a wall, Smith said. A Marshal and a parole officer then opened fire on him, hitting him at least once in the head, Smith said.
Smith said both the parole officers were taken to the hospital "to be checked out" and that their injuries did not appear to be serious. Dykes was in critical condition at Thomas Jefferson University Hospital and undergoing surgery late last night, police said.
Dykes' girlfriend, who was in the car with him at the time, was being questioned by investigators last night, but she had not been charged with any crime.
Last night, investigators were still processing evidence in the Chart House parking lot, where Dykes' damaged Buick and at least one SUV he crashed into marked the scene of the clash.
"They [the suspect] hit a black SUV, and that's when they unloaded," Drew Roman, a chef who works on the Spirit of Philadelphia dinner cruise near the Chart House, told reporters. "We just kind of watched it unfold. It was something else."
Smith said Dykes was on parole for an aggravated-assault charge. Court records show that he pleaded guilty in 2008 to a 2006 aggravated assault and gun-possession charge and was sentenced to five to 10 years in prison, followed by probation.
Court records show he was arrested for assault charges on at least two other occasions before his 2008 conviction.
A police source familiar with Dykes' past said: "He has always been a suspect in a lot of our shootings."
Sources say Dykes was wanted because he had allegedly stabbed his father. Smith said he was unsure when the stabbing occurred.
Smith said the quick thinking of the officers prevented the confrontation from taking an uglier turn. He said it was unclear last night whether Dykes had a gun in the car.
"He was armed with probably a 2,000-pound vehicle," Smith said, "which, in my opinion, is worse than a gun."
On Twitter: @morganzalot