Here's an exhaustive post - embedded with comments from various law types - that probable cause was likely not sufficient to justify the indictment.
And now his lawyers want a new judge.
Seminole Circuit
Judge Jessica Recksiedler disclosed late last week that her husband
works with CNN legal analyst Mark NeJame, who was approached by
Zimmerman earlier in the week about representing him after his original
lawyers quit. NeJame declined, but said he gave Zimmerman a short list
of alternatives, including Mark O'Mara, who Zimmerman ultimately chose
as his legal counsel shortly before his arrest.
O'Mara told
CNN late Monday night after filing his request that he expected Recksiedler to grant it and recuse herself.