The Ticker: CNN, msnbc.com, CBS…

> The man who killed his ex-girlfriend at the CNN Center complex in Atlanta last April has been sentenced to life in prison without parole. Arthur Mann was convicted of murder, kidnapping, aggravated assault with a deadly weapon and firearms possession charges in the death of 22-year-old Clara Riddles who worked at a hotel attached to the CNN Center.

> MSNBC.com saw its highest traffic for a presidential debate day ever on Tuesday, with more than 58 million page views. The site also had 1.2 million on-demand video streams of debate-related content on February 26 and 27, setting a two-day debate video record.

> The CBS Evening News begins a new series tonight, “For the Record.” The series takes an in-depth look at the legislative records of Sens. Hillary Clinton and Barack Obama. Tonight’s report by Dean Reynolds focuses on Obama’s record in Springfield, IL and Washington. Tomorrow, Nancy Cordes examines Clinton’s record.