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7 things to know now: When did Paterno know; Arsenio Hall; Kentucky Derby

Here's a roundup of news trending across the nation and world today.

What to know now:

1. When Paterno knew: According to court documents released Thursday, a boy told Penn State football coach Joe Paterno in 1976 that he was molested by Jerry Sandusky, Paterno's assistant  coach.  Paterno, who died in 2012, went to university officials in 2001, when he said he first found out about claims that Sandusky had molested boys. Sandusky was sentenced to between 30 and 60 years in prison for sexual abuse.

2. Hall vs. O'Connor: Comedian and former talk show  host Arsenio Hall is suing singer Sinead O'Connor over a Facebook post in which she said Hall provided Prince with drugs. Hall is suing for libel and asking for $5 million. The post said that if investigators are looking into who provided Prince with opiods, that they should talk to Hall.

3, Ryan vs. Trump: Speaker of the House Paul Ryan told CNN Thursday  that he is not quite ready to support Donald Trump as the Republican presidential nominee. "I hope to support our nominee, I hope to support his candidacy going forward," Ryan said in an interview with CNN's Jake Tapper on Thursday afternoon. "I'm just not ready to do that at this point. I'm not there right now." Trump responded with a statement, saying, "I am not ready to support Speaker Ryan's agenda ... ."

4. FBI investigates:  Huma Abedin, a longtime aide to Hillary Clinton, was interviewed by FBI investigators about her bosses private email server, an official with knowledge of the investigation told CNN. Abedin was one  of several Clinton aides to have been interviewed. A date for Clinton to be interviewed has not yet been set,  but is expected in the coming weeks. The official said that, so far, investigators haven't found evidence to prove that Clinton willfully violated the law.

5. Florida death sentences: The state of Florida is considering overturning the sentence of a death row inmate, a decision that could mean nearly 400 inmates will see their sentences reduced to life in prison. The case came to the court after the U.S. Supreme Court ruled  that Florida’s  death penalty was unconstitutional.

And one more

It's Derby weekend in Louisville with the  142 running of the Kentucky Derby set for Saturday evening. The  race, which will see 23 3-year-olds run the 1 ¼ mile track, starts at 6:34 p.m. ET. The winner gets $2 million and a chance to try for the Triple Crown.

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