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Happening now, intriguing new clues in the search for a gunman who fatally shot a healthcare CEO on a Manhattan

sidewalk.

Sources say police are looking carefully at words written on ammunition,

tied to the killing, and whether they offer hints about a motive.

Also tonight, a very busy day for Trump's transition up on Capitol Hill.

Pete Heggseth holds a fresh round of meetings as some key Republican senators

still won't commit to backing him for defense secretary. This, as Elon Musk and Vivek Ramoswamy

pitch lawmakers on their new government efficiency commission. And a scathing new U.S.

Justice Department report finds a very disturbing pattern of abuse and discrimination inside yet another major American police department, why federal officials say Memphis needs a serious overhaul.

Welcome to our viewers here in the United States and around the world.

I'm Wolf Blitzer.

You're in the Situation Room.

This is CNN Breaking News.

Let's get straight to our top story tonight to hunt for a killer in Manhattan.

Investigators are tracking down multiple leads right now as they try to piece together the

...