MINNEAPOLIS (WCCO) — The four stories to know for Monday, May 11, include an Elk River police officer killed, wild weather across the nation and more.

Elk River Cop Shot, Killed

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The Elk River police department is mourning the loss of an officer.

Sixteen-year veteran Officer Todd Besser and his son were both shot to death Saturday night.

It’s the first time a cop has been killed in the department’s history.

Now, authorities have another one of the officer’s sons in custody.

Chris Besser, 21, turned himself in not long after the double murder in the home he shared with his brothers in St. Michael.

Wild Weather Across The Nation

In northern Texas, the National Guard carried families to safety using helicopters. Two were rescued from atop their pick-up.

A tornado likely hurt more than 20 people near Van Texas.

In South Dakota, a tornado ripped the roof off a 100-year-old church.

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Snow fell in South Dakota and Wyoming.

Hurricane Ana made landfall in the Carolinas and is now a tropical depression heading north.

Running From Mama Bear

In case you missed it, tourists in Yellowstone National Park got a little too close to a mama bear’s cubs. (Watch video above!)

A black bear chased after people with cameras who had been taking pictures of three bear cubs on a road in Montana!

Fish and Wildlife rangers say the cubs were about 13 months old so the mother was not as protective as she would have been with new cubs.

Prince Plays Baltimore

The pop star announced the “Rally 4 Peace” after weeks of protests over the death of Freddie Gray in Police custody.

At the show, Prince called on the city’s youth to fix a broken system. Prince unveiled a song he wrote for the city, titled simply “Baltimore”.

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He also played his most famous hits.