2 police officers, 1 paramedic killed in MN while responding to domestic abuse report; Tens of millions under flood alerts on West Coast; Nikki Haley ramps up attacks on Trump over Russia ahead of South Carolina GOP primary; and more on tonight's broadcast.

An American ballerina has been detained in Russia on suspicion of treason, the body of a missing 11-year-old girl was found in Texas, and Nikki Haley has vowed to continue her presidential campaign.