It was the second time a shooting tragedy took a family member from the Daniels.
Daniels' teenage son had lost his life in a similar way, The Washington Post reported. He was shot in the back while running from a gunman.
It happened four years ago, when their 14-year-old son was walking home from the Metro, the newspaper reported.
• Richard Michael Ridgell, 52, of Westminster, Maryland, had three daughters who prompted him to join Facebook so he could keep up with them, The Washington Post reported. A friend once teased him for having only three connections on the social media site.
He attended high school in Maryland and worked for the Maryland State Police until 2000, capping a 17-year career with the force, the newspaper reported.
Ridgell loved his work, his country and the Baltimore Ravens, CNN affiliate WJZ reported.
"I don't want people to remember him as a victim cause he never was in his life, and he never will be. He was strong. I want him to be known as a dad above a victim of a shooting, cause he was a great dad for all of us," his daughter, Megan Ridgell, told the network.
• Martin Bodrog, 54, of Annandale, Virginia, grew up in New Jersey, Indiana and Massachusetts and graduated from the Naval Academy in 1981 before serving 22 years in the military, where he received numerous awards and medals, according to a family statement. After his career, he oversaw the design and procurement of ships for the Navy.
Bodrog and his family (wife of 23 years, Melanie, and daughters Isabel, 23, Sophie, 17, and Rita, 16) taught Sunday school for preschoolers, and he was active in Young Life, a Christian outreach group for high school students.
It was common to see him, in all weather, wearing shorts and a Boston Bruins jersey, walking his dog and helping shovel snow out of his elderly neighbors' driveways.
"He was such a great man," Selma Nunes, a friend of Bodrog's, told CNN's Erin Burnett. "Everything he did was purposeful, meaningful, and was intentional, and because of that he did everything with excellence."
"So many people have regrets, and I can say with confidence that he lived the American dream," she said.
• Vishnu Bhalchandra Pandit, 61, of North Potomac, Maryland, had a stream of cars arriving at his home late Monday, neighbor Zhaohua Zhou told The Washington Post.
Mike Honig, another neighbor, described Pandit as "a very nice man with an Irish setter." He said Pandit and his wife had lived in the neighborhood for 20 years.
• Kenneth Bernard Proctor, 46, of Waldorf, Maryland, married his high school sweetheart. He and Evelyn were married 19 years before an amicable divorce this year. He still called her every morning before breakfast at the Navy Yard, where he worked as a civilian utilities foreman, Evelyn Proctor told the New York Daily News.
The Washington Redskins fan had two children with Evelyn: Kendull, 15, and Kenneth, 17. Kenneth is in Army basic training in Oklahoma, Evelyn Proctor told the newspaper, describing her ex-husband as "a very loving, caring, gentle person."
• Mary Francis Knight, 51, of Reston, Virginia, was an information technology contractor who had been in Washington for five years, her family told CNN affiliate WITN.
The daughter of a Green Beret and a native of Fayetteville, North Carolina, Knight had two daughters herself -- Nicole, who got married earlier this year, and Danielle, who lived with Knight.
Knight was also an adjunct professor at Northern Virginia Community College.
"She was a great patriot who loved her country and loved serving the USA," family spokesman Theodore Hisey told WITN.
• Gerald L. Read, 58, of Alexandria, Virginia, was an information assurance specialist in the Navy Sea Systems Command who spent much of his career in military law enforcement and as a systems analyst, according to The Washington Post. The former Army lieutenant with two master's degrees worked as a civilian at the Navy Yard, managing security risks related to data.
His wife of 35 years, Cathy, described him as a "totally reliable, really, really solid" husband who loved reading -- especially books about the Civil War -- and was close to his daughter and three grandchildren, according to the newspaper.
Read and his wife had been rescuing Labrador retrievers for a decade. The couple had three Labs, an Irish setter and two cats, but Read was most fond of his black Lab, Roderick, the paper reported.
• Sylvia Frasier, 53, of Waldorf, Maryland, was the second-youngest of seven children, The Washington Post reported. Her family gathered Monday inside a three-bedroom home waiting for news.
"No matter how we feel, no matter what information we get from the FBI, we have got to forgive," Wendy Edmonds, Frasier's sister, told the newspaper. "We have to forgive. We can't become bitter."