"(What) we see in the neurological testing of Mr. Nelson is a decline in his ability to use his brain effectively," said Dr. George Woods, who evaluated Nelson. "You see a real decline in his cognition."
On Wednesday afternoon, prosecutors had a doctor testify that Nelson does not have a mental illness and he understood everything about the proceedings during an evaluation.
Once White ruled that Nelson was competent to stand trial, Nelson said he would like his case to go to trial as soon as possible.
A status hearing is scheduled for 9 a.m. Thursday.
Nelson remains in prison on charges of first-degree murder, kidnapping with a weapon, burglary and carjacking, among other charges.