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Live from NPR News in Washington, I'm Windsor Johnston. Federal and state officials in Minnesota are at odds over

the investigation into the death of Alex Preti, who was shot and killed by federal immigration

agents on Saturday. NPR's Luke Garrett reports a U.S. Senator from that state says the federal

government is denying state investigators' access to evidence.

Senator Tina Smith, a Minnesota Democrat, tells NPR the federal government is ignoring a federal

court order. Our state investigators had to get a warrant to have access to the evidence

of the shooting of Alex Preddy.

And even then, the federal agents refused to give them access to the evidence.

Smith called the government's handling of the case a cover-up.

On Saturday, immigration officers shot dead Alex Preddy, a 37-year-old U.S. citizen protesting the ICE operation.

There are conflicting accounts of what led up

to the shooting. Republican senators Tom Tillis of North Carolina and Bill Cassidy of Louisiana are

calling for a joint state and federal investigation into the killing. Luke Garrett, NPR News,

Washington. A massive winter storm is making its way across a large part of the country today, bringing

heavy snow, ice, and freezing rain to more than 30 states. Bruce Convisor reports from New

Jersey, where whiteout conditions are making travel treacherous. Predicted snow totals have dropped

for much of the state, but that doesn't make the storm less dangerous.

Instead of 12 to 18 inches of snow, a large swath of the state is now looking at 6 to 10 inches,

but in addition to the snow, a glaze of ice is also expected. That ice could wreak more havoc than the snow, as it has the potential to weigh down power lines and prompt widespread power outages.

Travel is expected to grind to a halt.

Officials are urging residents to stay off the roads on Sunday. New Jersey Transit said it will be

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