Among the points Willmott addressed Thursday was DeMarte's contention that it was odd, given Arias' gaps in memory from the day of the killing, that the moment she realized she had blood on her hands after driving far away from the scene, she believed she had killed Alexander.
DeMarte called that an "illogical" response.
"Given all the things that she does remember up to that point, it's not a huge leap ... to assume that something bad happened when she sees blood on her hands?" Willmott asked.
"As I stated before, that is a huge leap," DeMarte replied.
Willmott also repeatedly reminded jurors of the roughly 12 hours DeMarte spent with Arias before coming to her conclusions, compared to the more than 40 hours the defense witness who said Arias had battered woman's syndrome spent with the defendant.
She is trying to portray DeMarte's work as incomplete, while the psychologist criticized the defense expert's extensive time with Arias as extreme, leading to a biased opinion.
"Oh, you didn't know that?" Willmott said several times after asking DeMarte questions about Arias' life that the witness couldn't answer.
DeMarte explained that she had spent enough time with Arias to come to her conclusions.
Testimony resumes Tuesday as prosecutor Juan Martinez continues calling rebuttal witnesses ahead of closing arguments. Deliberations are likely still several weeks away.
Brian Skoloff can be followed at https://twitter.com/bskoloff