10:20 a.m.

A college roommate of Tamerlan Tsarnaev's (tsahr-NEYE'-ehvz) wife has testified in the Boston Marathon bombing trial that she and another roommate fled their apartment in the middle of the night after Tamerlan yelled at her and threatened her.

Amanda Ransom said Tuesday she was close friends with Katherine Russell from 2007 to 2009. She says Russell became alienated from her friends after she began dating Tamerlan, the older brother of Dzhokhar (joh-HAHR'), who is on trial for his life.

She says she was awakened in 2009 by loud noises. She went to check on Katherine, and Tamerlan yelled at her and said, "If I ever see you again ..."

Dzhokhar's lawyers say Tamerlan was the mastermind of the 2013 bombings. Tamerlan died in a police shootout.