Authorities on Sunday identified three victims in Friday’s crash at a Reno, Nevada, air race.

In all, nine people were killed, including the pilot, who was identified previously.

Michael Joseph Wogan, 22, of Phoenix, was attending the 2011 National Championship Air Races with his father as part of a father-and-son vacation, his family said in a statement. His father, William, was “seriously injured,” the statement said.

The pilot, 74-year-old Jimmy Leeward, lost control of his vintage plane during the race and crashed into spectators. Reno police said Saturday that seven people died at the scene, including Leeward, and two more died in hospitals. Close to 70 people were injured.

Wogan was diagnosed at an early age with muscular dystrophy, and was wheelchair-bound his entire life. However, said his 19-year-old brother, James Wogan in the statement, “He was about moving past that and always driven toward independence. Michael liked to get out and travel, and he was so excited about getting on a plane as part of this trip.”

Michael Wogan graduated magna cum laude from Arizona State University with a finance degree in May, his family said. He had operated a web development company and was in the process of developing a second business.

Memorial service details were pending, the statement said.

Also identified Sunday were George and Wendy Hewitt, members of Cascade EAA Warbirds Squadron 2. The Hewitts were killed when the plane crashed into the seating area, said R.D. Williams, spokesman for the squadron.

According to its website, the squadron aims to “promote and encourage the preservation and operation of World War II and other such aircraft that are representative of military aviation operations” along with educating people on safely operating and maintaining such aircraft.

National Transportation Safety Board member Mark Rosekind said investigators are looking at whether the plane’s apparently damaged elevator trim tab — whose breaking apart was captured in a photograph — played a role in the nosedive crash. Authorities do not know why the aircraft went down.

“We’re aware of that, and in fact, a component has been recovered in the area where it was observed, but it’s critical at this point to note that we have not identified this component,” Rosekind told reporters Saturday. “It will be examined, so we don’t know what the component is and whether it came from this particular aircraft.”

He said later that investigators had identified and recovered portions of the plane’s tail.

A full investigation could take six to nine months, Rosekind said.

Investigators will be poring over a trove of spectators’ videos and photos, he said.

“It seems there were a tremendous number of cameras and video that was captured,” he said. “On the one hand, it’s an excellent source of information, but on the other hand, there’s not a lot of other specific components from the wreckage that at this point we can identify.”

At the time of the crash, three NTSB investigators happened to be at the air show — a common practice — and one of them has been appointed investigator in charge, Rosekind said.

The board will look at safety oversight and the placement of the grandstands for the air race, Rosekind said.

Investigators are also looking into whether the plane had a black box, Rosekind said, though at this point, he does not believe it had a recording device.

Reno Mayor Bob Cashell told reporters that the air race spectator fatalities were the first in four decades. The Reno Air Race Association was founded in 1964, according to its Facebook page.

“This is the first time in 40 years, I think, that we’ve had a visitor injured or killed,” Cashell said Saturday. “We’ve lost some pilots, but we’ve never had a major catastrophe.”

One local hospital, Renown Medical Center, received 34 patients, four of whom were in critical condition as of Sunday afternoon. Two patients — a male and a female — died, the hospital said Friday.

Dr. Mike Morkin, the medical director of emergency services at the hospital, was on duty when the call about the crash came in Friday.

“The severity of this accident was the worst I’ve seen since I’ve been at Renown,” Morkin, a 16-year veteran at the hospital, said, adding “it was traumatic.”

Renown South Meadows Medical Center received and discharged five patients, the hospital said Saturday.

St. Mary’s Hospital in Reno said it had accepted 28 patients from the accident: As of Sunday afternoon, two were in critical condition and six in serious condition. The remainder have been released.

Leeward, a real estate developer from Ocala, Florida, was flying a P-51 Mustang, a show official said.

The air races were canceled in the wake of the crash, the show said on its website. A memorial service scheduled for the pilot in Reno was also canceled because his family left the area, said Valerie Miller, a race spokeswoman.

Several witnesses were calling the pilot a hero because he maneuvered the plane away from the crowded grandstands at the last moment.

Ben Cissell said the plane crashed about 100 feet from where he was seated.

“I think that pilot in the last seconds pulled up because he saw the bleachers and saved about 200 or 300 others,” Cissell said.

Kim Fonda said she also saw the plane streaking toward where she was seated in the grandstand.

“I closed my eyes and said, ‘I am going to die now,’ ” Fonda said. “I was literally preparing to die and then he jerked the plane away and it landed like 25 feet from us. I want his family to know he was a hero.”

Video of the crash, posted on YouTube, showed a plane plummeting from the sky, sending up clouds of dust and debris. Shocked spectators rose to their feet.

Another witness, Greg Mills, said the pilot “didn’t have enough altitude to pull up,” with the aircraft shuddering before slamming to the ground about 50 to 75 yards from where he was standing.

The plane, called the “Galloping Ghost,” was taking part in a qualifying round in the “unlimited class” division of the air race when it went down around 4:15 p.m. PT Friday, said Mike Draper, the show spokesman. The final rounds had been slated for the weekend.

CNN’s Divina Mims contributed to this report.