Former senator and candidate Edwards is accused of misusing campaign donations to hide his affair with Rielle Hunter and her subsequent pregnancy with his baby.
Andrew Young, a former aide to ex-presidential candidate John Edwards, testified Friday in the trial. Young testified for a fifth day.
Young had pretended to be the child's father and took Hunter into hiding to help Edwards during his 2008 presidential campaign.
Young said he felt he was in danger during a rural meeting in 2008. Young said he met Edwards on a rural road in 2008 to demand that Edwards tell the truth about the affair. He said Edwards drove them through a remote rural area and at one point Young worried he was going to be killed.
Edwards faces up to 30 years in prison if he's convicted. He has pleaded not guilty.
The Associated Press contributed to this report.