Tensions rose during cross-examination Monday, Aug. 24, as Clancy’s attorney, Kevin Reddington, appeared to question Dr. Avram Mack’s knowledge of postpartum psychosis

Prosecutors hired Mack, along with another doctor, to interview Clancy earlier this year at Tewksbury Hospital, where she is being held while awaiting the verdict.

Dr. Avram Mack resigned from his position at a children’s hospital in Delaware just days after testifying in the Lindsay Clancy murder trial.

And when Clancy strangled the children, Mack testified that she said, “Go to God.” Mack testified he believed that statement meant she knew her children were innocent when she killed them and that she still did so methodically.

Lindsay Clancy's attorney accused the prosecution's expert witness of being 'way off base' in his testimony regarding pregnancy and delivery.

Avram Mack testified on Friday, Aug. 21, and Monday, Aug. 24, as a prosecution rebuttal witness in the nationally watched case against Clancy.

Nemours Children’s Health confirmed psychiatrist Avram Mack, who testified as a prosecution expert in Lindsay Clancy’s murder trial, is "no longer employed."

During day 19 of Lindsay Clancy’s murder trial Aug. 24, psychiatrist Avram Mack got into a heated exchange with defense attorney Kevin Reddington.

Dr Avram Mack resigned from his job at a children's hospital after he testified that Lindsay Clancy is criminally responsible for killing her children.