Story highlights Donald Trump has wondered aloud whether Ben Carson had made up key details of his rough upbringing

"When you suffer from a pathological disease, you're not really getting better unless you start taking pills or something," Trump told Fox News' Bill O'Reilly

Washington (CNN) Donald Trump on Friday charged that Ben Carson still suffered from a "pathological disease" that hasn't left the retired neurosurgeon since he was a violent youth growing up in Detroit.

"When you suffer from a pathological disease, you're not really getting better unless you start taking pills or something," Trump told Fox News' Bill O'Reilly of Carson, who has described his childhood anger and temper as "pathological." "Do you think that's the right temperament to be president? I don't think so."

Trump added that he did not think questions about Carson's past were "small ball," casting aspersions on his presidential rival's backstory.

"There's something very strange here. Something very strange is going on," he said.

Read More