SCIUTTO: Italian officials say that two young American men, arrested in the killing of an Italian police officer, will remain in custody while the investigation is under way. 19-year-old Finnegan Elder and 18-year-old Gabriel Natale-Hjorth were arrested inside their hotel rooms in Rome, where they were on vacation at the time. According to investigators, they had stolen a man's backpack and demanded money and a gram of cocaine for its return. That man called police. And it was during a confrontation that one of the plainclothes officers was stabbed -- that's a picture of him there -- 11 times. A second officer was also assaulted. He is expected to be OK. Meanwhile, Italian authorities say they are looking into this photo of Hjorth. Authorities are investigating why he was blindfolded, as well as who leaked the photo. A prominent Russian opposition leader has been discharged from the hospital and returned to jail. This, against the wishes of his doctor. Alexei Navalny was rushed to hospital yesterday from a Moscow jail. Russian state media have downplayed his hospitalization, but Navalny's doctors say he may have been exposed to some sort of chemical agent. Massive protests in Moscow this weekend. You see them there, the police reaction violent at times. Navalny was sentenced to 30 days in prison after calling for those protests, as a response to the disqualification of opposition candidates for Russian municipal elections. And other stories we're following. Police in California have now identified the gunman who opened fire at a crowded festival there, killing three people including a child, and injuring a dozen others as the search continues for a possible second suspect. Stay with us. We're on top of the news.
Alexei Navalny Returned to Prison From Hospital.