ORLANDO, Fla. -- Casey Anthony's mother wrote in a letter that she has never given up believing that her daughter Casey, who faces a murder charge in the death of her toddler, is innocent.

The letter Cindy Anthony wrote last summer to jailed daughter Casey was among 1,000 pages of documents released Tuesday by the State Attorney's Office. Cindy Anthony says in the letter that after Casey Anthony's trial is over, they will look together for young Caylee Anthony.

The toddler's remains were found in December 2008, months after she disappeared. Despite that, Cindy Anthony has said previously she believes her granddaughter is still alive.

Casey Anthony has pleaded not guilty to a first-degree murder charge and said a baby sitter kidnapped Caylee. Trial is set to begin in May.