Americans are slightly less sure that the man who shot black Florida teenager Trayvon Martin is guilty of murder but more convinced that he’ll be found guilty of that crime. However, a sizable number still remains unsure about what happened and what will happen in the days ahead.

Thirty percent (30%) of American Adults now believe George Zimmerman should be found guilty of murder, compared to 33% who felt that way just over two weeks ago. But a new Rasmussen Reports national telephone survey finds that 24% think Zimmerman acted in self-defense, a view held by just 15% in the previous survey. Forty-six percent (46%) are not sure, down from 55% in late March.

The survey of 1,000 Adults nationwide was conducted on April 11-12, 2012 by Rasmussen Reports. The margin of sampling error is +/- 3 percentage points with a 95% level of confidence. Field work for all Rasmussen Reports surveys is conducted by Pulse Opinion Research, LLC.