Police keep watch near the scene where Boston Marathon bomb suspect Dzhokhar Tsarnaev was captured last Friday, hiding in a backyard boat. Tsarnaev, 19, was charged on Monday with carrying out the bombing with his older brother, Tamerlan Tsarnaev, who died last week in a gunbattle. Tsarnaev could get the death penalty. (AP Photo/Elise Amendola)Via Scott Malone and Samuel P. Jacobs BOSTON (Reuters) – Hundreds of regulation enforcement agents from around the us of a plan to attend a memorial on Wednesday for a campus police officer who authorities say was once slain by the accused Boston Marathon bombers, and Vice President Joe Biden is slated to speak at the ceremony. The provider on the Massachusetts Institute of Know-how honors 26-12 months-previous Sean Collier, who police say used to be shot and killed by Tamerlan and Dzhokhar Tsarnaev on the MIT campus on Thursday night time. …