Before forcing their way into the vehicle the night of April 18, the brothers shot dead a campus police officer at the Massachusetts Institute of Technology, police said.
Police have yet to name the two people shot dead by the gunman.
Pendleton was the 42nd victim shot dead in the city this year.
The march finished at the cemetery to lay two wreaths in memory of the two workers shot dead by the Army in 1911.
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He told The Associated Press by telephone that the attackers shot the men dead in their sleep but that no poison was involved.
The attackers were shot dead in fighting with the Central Reserve Police Force.
The attackers were shot dead in fighting with the Central Reserve Security Force.
In 1990, the spokesman for the Islamic Group was shot dead in the street in Cairo.
The people who were shot dead by the Army in Ballymurphy included a priest and a mother-of-eight.
Officials said it appeared the victims had been shot dead, then the vehicles set alight.
The world's conscience was stirred by the deaths of famous journalists, including Anna Politkovskaya, shot dead at her Moscow apartment bloc in 2006, Hrant Dink, killed in an Istanbul street early the following year, and Lasantha Wickramatunga, the newspaper editor shot dead in Colombo in 2009.
One report said that the doctor shot dead was a complainant in the case.
She then ran upstairs to find the Holtzbergs shot dead, lying on the ground with their son crying over them.
In 2002, Marco Biagi, the economic adviser who drew up the original proposal, was shot dead by the Red Brigades.
Earlier this year the police shot dead a number of men said to be plotting the murder of film star Amir Khan and director Ashutosh Gowarikar, the team behind the Oscar-nominated "Lagaan".
In a separate attack, a candidate running for the national Parliament in the May 11 election was shot dead in the southern city of Karachi, the first such killing of a national candidate in this campaign.
In addition to the two men shot dead, a lone body has been found inside the charred ruins of the Modesto, California, apartment building, Modesto police Officer Chris Adams told CNN on Friday.
Ahmet Krasniqi, a leading proponent of independence for the province, was shot dead in Tirana, the capital of Albania.
Det Garda Donohoe, a father of two, was the first member of the force to be shot dead on duty since the murder of Det Garda Jerry McCabe in 1996.
Det Garda Donohue, who was married with two children, was the first member of the force to be shot dead on duty since the murder of Det Garda McCabe in 1996.
"Gunmen suspected to be members of Boko Haram came to the town market and shot dead 13 local hunters on the spot while five others died from their injuries at the hospital, " the official said.
The men were later stripped and shot dead by the IRA, and their bodies were dumped in waste ground.
And in the end, that was the difference between growing up and becoming a lawyer, a mother, and First Lady of the United States, and being shot dead at the age of 15.
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As the movie opens, the Earp brothers are herding cattle to Tombstone, Arizona, in 1882 when the youngest brother James is shot dead (in the back, of course) by the rustling Clanton family.
The candidate who was shot dead on Friday in Karachi deepened the tensions over security ahead of the elections.
Nigel Lutton - the son of a former RUC reservist shot dead by the IRA in 1979 - will be the candidate.
Nigel Lutton - the son of a former RUC reservist shot dead by the IRA in 1979 - will be the unionist unity candidate.
Police in Merseyside have said they are "still as determined as ever" to catch the killer of a man who was shot dead in the street nine years ago.
Most of the left-wing activists were taken from their cells in the central city of Cordoba and shot dead shortly after the military took power.
Sam Rocket, 22, who had close links with the UVF, was shot dead at his girlfriend's house on the following Wednesday night in reprisal for their double murder.
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