​Mother, 2 young sons among 6 dead in Maryland plane crash

GAITHERSBURG, Md. -- Police in Maryland on Tuesday tentatively identified two more people who were killed when the plane they were flying in crashed into a house in the Washington, D.C., suburbs.

Officers said they were 52-year-old David Hartman and 31-year-old Chijioke Ogbuka. A third occupant of the private jet, 66-year-old Dr. Michael Rosenberg, was also killed in the crash Monday in Gaithersburg.

Montgomery County Police said their identities will be confirmed once autopsies have been completed by the Office of the Chief Medical Examiner in Baltimore.

Police said the three were from Raleigh, North Carolina.

A mother and her two young sons, one of them just a month old, were also killed when the jet crashed into their two-story wood-frame home, which was engulfed in a fireball, authorities and witnesses said.

Marie Gemmell, 36, tried to protect 3-year-old Cole and 1-month-old Devin from the smoke and fire, but there was nothing she could do, Montgomery County police spokesman Capt. Paul Starks said. Her body was found in a second-floor bathroom, lying on top of her sons.

Ken Gemmell, Marie's husband and the boys' father, posted a message Tuesday on Facebook:

No words can describe the enormity of our loss and sadness over yesterday's tragedy. We lost Marie, the love of my life and college sweetheart, and our two young, innocent and joyful sons - a loss that no person should ever endure. The outpouring of support has been overwhelming, and my daughter and I are appreciative for the prayers and well wishes from friends, neighbors and the community. We also appreciate the dedication and hard work of the firefighters, police and other first responders who did everything in their power to try to save my family during this horrific event. There will be a lot of grieving over the coming weeks, and we request that the media respect our privacy so I can provide my daughter with some degree of normalcy as we try to re-build.

Ken Gemmell and the couple's five-year-old daughter, Arabelle, weren't home at the time of the crash. CBS affiliate WUSA reported that friends have started gathering donations for the family, including clothing.

The jet's fuselage crashed into the front lawn of an adjacent home, which was heavily damaged by fire, and investigators believe one of its wings, which had fuel inside, sheared off and tore through the front of the Gemmell home, said Robert Sumwalt, a National Transportation Safety Board member.

In a press conference Tuesday afternoon, Sumwalt said the plane's flight data recorder shows that just before the crash, the jet slowed to just over 100 miles per hour and its computers began sounding an alarm.

"There was an automated radio altitude call out at 500 feet, 32 seconds before end of recording," Sumwalt said. "About 20 seconds before the end of the recording, there was an automated stall warning. This is an audio call out that states, 'Stall, stall!' Not a stall of the engines, an aerodynamic stall."

Because of the stall, the plane would no longer be generating enough lift to remain airborne, according to Sumwalt.

"The initial examination of both engines reveals no evidence of fire, engine failure or uncontainment," Sumwalt said. "Both fans were able to be rotated by hand at site. Preliminary onsite look reveals no evidence of bird ingestion."

The plane took off from Chapel Hill, North Carolina, and was approaching a runway at the Montgomery County Airpark, about a mile from the crash site, when it went down, Sumwalt said. Witnesses reported that the plane was flying too low and careening wildly before the crash.

"This guy, when I saw him, for a fast jet with the wheels down, I said, 'I think he's coming in too low,'" Fred Pedreira, 67, who lives near the crash site, told The Associated Press. "Then he was 90 degrees - sideways - and then he went belly-up into the house and it was a ball of fire. It was terrible.

"I tell you, I got goosebumps when I saw it," Pedreira said. "I said, 'My God, those are people in that plane.'"

In 911 calls released by authorities overnight, shock and alarm is evident in the callers' voices.

"I just saw a jet hit a house! The house is on fire," one man said. "When he came in on final (approach), it flamed out and he went straight down into that house."

The home was gutted by the crash and ensuing blaze. No one was injured in the two adjacent homes that also had major damage.

Health Decisions of North Carolina identified Rosenberg as its founder and CEO. Nuventra Pharma Sciences of Durham, North Carolina, said Hartman was vice president of clinical pharmacology.

Rosenberg was a pilot who crashed a different plane in Gaithersburg on March 1, 2010, according a government official who wasn't authorized to speak publicly and asked not to be named. Investigators were still trying to determine if Rosenberg was at the controls at the time of Monday's crash.

Montgomery County Executive Isiah Leggett said Tuesday that the county would review policies and procedures at the airport, including the paths of approach to the runways.

"When you have an incident like this, it calls into question the safety," Leggett said during an appearance on NewsChannel 8, a local cable channel. "We certainly owe it to the community to go back and check and evaluate, and we will do that."

Including Monday's crash, there have been 30 accidents at the Montgomery County Airpark in the past 31 years, according to NTSB records. Before Monday, the most recent fatal crash was in 1990, and most of the recent crashes involved minor or no injuries.

Steve Hedges, a spokesman for the Aircraft Owners and Pilots Association and a pilot who knows the Gaithersburg airport well, said many of the recent incidents would be better characterized as hard landings, and some occurred during flight instruction.

"That's not unusual in an instructional environment. Things happen when people are learning how to fly," Hedges said Tuesday. "I think it's a very safe airport, actually.

Investigators planned to remain on the scene for up to seven days collecting evidence, Sumwalt said. The agency planned to look into everything that could have led to the crash, including crew experience and proficiency, training and procedures, equipment performance, weather and other environmental factors.