While social media is usually frowned upon by officials, the Boston Police are looking for help from people who were at the Boston marathon, and may have some answers. 

In this day and age we take photos and video of everything  The Boston Police are thinking they might be able to get more clues if they can see photos and videos that people have of Monday's events.

They are asking people to send in anything they have that will assist them in the investigation.  They also have a couple of numbers for people to call.

If you have more information on the explosions:

Family Victim Hotline: