A U.S. Capitol Police hazmat vehicle is parked at a mail processing plant in Prince George's County where a letter addressed to Sen. Roger Wicker, R-Miss., tested positive for ricin, Tuesday, April 16, 2013, in Hyattsville, Md. An envelope addressed Wicker tested positive Tuesday for ricin, a potentially fatal poison, congressional officials said, heightening concerns about terrorism a day after a bombing killed three and left more than 170 injured at the Boston Marathon. (AP Photo/Molly Riley)

Ricin letter saga: As it unfolded

Letters containing ricin found their way to a congressman and President Barack Obama. Here’s a look at news alerts since the first instance.

FILE - This March 19, 2013 file photo shows Canadian singer Justin Bieber performing during a concert at Bercy arena in Paris. Bieber has visited the Anne Frank House in Amsterdam, with a museum spokeswoman saying the Canadian pop star wrote in the guestbook that he hoped Frank "would have been a Belieber" if she had lived. Museum spokeswoman Maatje Mostart confirmed Sunday, April 14, 2013 that Bieber visited Friday evening. (AP Photo/Francois Mori, file)

Germany: Bieber’s monkey going nowhere

German customs authorities said Tuesday that Justin Bieber’s monkey is going nowhere for now even though the singer has apparently asked tha…

Ricin suspect released from jail

The Mississippi man charged with sending poisoned letters to President Barack Obama, a U.S. senator and a state judge was released from jail…