MICHEL MARTIN, HOST:
As we mentioned, the new police chief of Sanford, Florida, where the Trayvon Martin shooting took place, has now issued new guidelines for neighborhood watch groups and volunteers. We wanted to hear more about that, so we've called NPR correspondent Greg Allen, who's been covering the story. Greg, thanks so much for joining us once again.
GREG ALLEN, BYLINE: Oh, my pleasure, Michel.
MARTIN: So what specifically are the major changes called for in these guidelines?