SANFORD, FL - APRIL 30: George Zimmerman, defendant in the killing of Trayvon Martin, arrives in Seminole circuit court with his attorney Mark O'Mara (L) for a pre-trial hearing April 30, 2013 in Sanford, Florida. Lawyers on both sides of the Trayvon Martin murder trial are jockeying for position as the trail is expected to start June 10. The defense seeks to add witnesses, but declines to identify them as the prosecution accuses them of grandstanding. (Photo by Joe Burbank - Pool/Getty Images)
(AP) -- The identities of potential jurors in the trial of a neighborhood watch leader charged with killing Trayvon Martin will be kept confidential.
The judge presiding over George Zimmerman's trial also ruled Wednesday that potential jurors won't be sequestered, as requested by defense attorneys.
During jury selection beginning next week, potential jurors only will be referred to by their jury numbers.
Circuit Judge Debra Nelson says this is being done to protect jury candidates from potential harassment and public pressure.
The judge also prohibited photographers from taking photos of potential jurors during jury selection.
Zimmerman is charged with second-degree murder. He is pleading not guilty, claiming self-defense.
His trial starts next week and is expected to last a month or so.
Attorneys need to pick six jurors and four alternates.