The investigation into his attack there has hit at least one roadblock.
FBI agents have had difficulty accessing data stored on the cellphone Mateen used during the massacre because it was damaged by water and blood, a law enforcement official said.
But technicians are putting the device through a drying process and are confident they ultimately can recover phone numbers, texts, photos and other data, said the official, who spoke on condition of anonymity to discuss progress in the investigation.
Federal prosecutors investigating the possible mishandling of classified materials on Hillary Clinton’s private email server have begun the process of setting up formal interviews with some of her longtime and closest aides, according to two people familiar with the probe, an indication that the inquiry is moving into its final phases.
In the Tsarnaev case, according to sources familiar with the talks, overtures were made to discuss a plea arrangement. But in the end prosecutors saw little reason to deal. Surveillance video and other evidence put Tsarnaev at the finish line of the race when the bombs went off. Instead the government has pushed to win its first death penalty case since Sept. 11.