ROCKVILLE, Md. (WUSA) --- A local principal who ran in the Boston Marathon quickly let his school in Rockville know he was safe.

Andrew Winter says he used his cellphone, his Twitter account and an automated phone message to tell his community at Lucy V. Barnsley Elementary School that he was unharmed after the blast yesterday.

He said he finished the race about half an hour before the bombs went off.

Today he continued to show his students he was just fine.

"I was out on the front steps when the students came in, high-fiving and welcoming the students. 'Hey! So you're back! You know, glad you're ok.' 'Yep, I'm fine.' You know, I'm here and just try to reassure. No discussions because there is no need, let the parents handle that."

ROCKVILLE, Md. (WUSA9) -- Friends and family released balloons at Rockville High School, in memory of Michelle Miller.

Her father spoke at the makeshift memorial service for the slain 17-year-old senior, "Life's never going to be the same for me. My life's torn apart."

Police believe Staff Sgt. Adam Ardnt, a military recruiter, shot Miller in the head before killing himself at his Germantown home Sunday night. Her father says she went over because Ardnt seemed suicidal. Police still have not released a motive. 

Her grandmother wants the honors student and star athlete, who had dreamed of helping troubled vets, to have a full military funeral with honors. 

"I think she's a hero because she gave her life trying to save someone else's," Alice Miller said. 

CHARLES COUNTY, Md. (WUSA9) -- The girl, who was attacked by at least one or more dogs has been stabilized, after being taken to the hospital in critical condition on Wednesday evening in Charles County, Md., officials said Thursday morning. 

The incident took place at a home in the 8600 block of Billingsley Road in Bennsville, MD.  The child, who was said to be in critical condition, was flown to Children's Hospital in Washington, DC.

The girl was supposed to be under the supervision of her mother's boyfriend at the time of the attack.  The boyfriend lost sight of her and later found her laying face down in the backyard where she had already been attacked, according to officials. 

Charles County Animal Control has taken three dogs into custody.  A pit bull, a bulldog, and a cane corso are the breeds suspected to be involved in the attack.