The son of a New York nanny on trial for the fatal stabbings of two children reportedly testified that the brutal October 2012 murders were an “accident” and that his mother loved the two children she’s accused of killing.

His mother, nanny Yoselyn Ortega, is accused of fatally stabbing Lucia, 6, and 2-year-old Leo Krim in their Manhattan apartment. Despite being accused of murder, Frias stated that Ortega cared for the children.

According to the New York Post, Frias was describing his mother’s prolonged depression when he said, “In that time frame before the accidents.”

“I’m sorry—did you just say, ‘the accident?’” assistant district attorney Stuart Silberg rhetorically asked Jesus Frias, 22, after his testimony.

Following Silberg’s reaction, Frias reportedly backtracked and said, “before what happened.”

Frias went on to claim that Lucia would draw pictures for his mother and his mother would put the six-year-old on the phone with him to practice her Spanish.

“Whenever the Krims were doing something, my mom would take care of (the kids),” Frias testified, according to the New York Daily News.

“They seemed like they loved my mom. She loved them back.”

On the day of the murders, Frias testified his mother appeared depressed but kissed him goodbye and sent him off to high school as she normally would. Lucia and Leo would be dead hours later.

Lawyers for Ortega, who has pleaded not guilty by reason of insanity, argued that Ortega was in a psychotic state and shouldn’t be held responsible for her murderous actions.

However, prosecutors believe the nanny killed the children to get back at their parents. They’ve alleged that Ortega was jealous of Marina Krim, the victims’ mother, and believed the family was overworking her.

Ortega’s daughter testified Monday that parents Marina and Kevin failed to see that the nanny was “unraveling.”

“Why didn’t those parents realize and take her out themselves—they were seeing it,” Miladys Garcia said in court Monday, Fox News reported. “Give her a vacation if you see she’s losing weight, say ‘Yosie, you’re not yourself.’ Even a week of vacation. Say, ‘Go, Yosie, you’re very thin.’”

While relatives have claimed that Ortega said she would see a vision of a black man or black shadow prior to the murders, Frias said his mother never told him about the hallucinations.

According to the New York Daily News, Frias also said that Kevin treated him extremely well, providing him with guidance and even paying him $50 a day to dog sit during the summer.

Silberg asked, “And they [the Krims] treated your mother even better, didn’t they?”

“Yes, they did,” Frias responded.

[Featured Image: Leo and Lucia Krim/Facebook]