purple symbolizes the fight against domestic violence and also alex kogut's favorite color. ed alex's former teammates. >> i said paint your pinkies purple and this is for alex. you have more strength in your pinky than the worst thing that could have happened. >> reporter: still purple ribbons in alex's home town. still a memorial to honor students that have died. the college, that itself has had to heal and has since opened an awareness to dating violence. and there are still those, like page whitney, that will never let the memory of a gracious, joyous young spirit fade away. >> for the rest of my life, whenever i see purple, i will think of her, whenever i hear a story of any type of domestic violence i will think of her and i will never stop telling her story. >> that's all for now. >> i'm craig melvin. >> and i'm natalie morales. >> and this is dateline. >> i couldn't comprehend what was happening. i couldn't sleep. losing my husband. it's an image that is never gonna go away. >> a father out for a walk with his son. >> i heard shots. very loud shots. >> the child survi