This news from the Arizona Republic doesn't seem like a positive development:
Family members of the suspect in the Gabrielle Giffords shooting on Monday blockaded themselves into their home north of Tucson and were refusing FBI agents' entry.
At about 12:25 p.m., agents began banging on the blockade built with 4-by-4 double-thick plywood, yelling, "This is the FBI. Let us in." The blockade is preventing access to the front porch of the home.
Some agents were sent behind the house, and media representatives could hear the agents talking with someone from inside the house.
UPDATE: The FBI has been let into the home, according to the updated Republic story.