A juror has been dismissed from serving on the murder trial for a Manhattan nanny accused of murdering two children in their Upper West Side apartment.

Yoselyn Ortega is on trial for the brutal 2012 murders of six-year-old Lucia Krim and her two-year-old brother Leo Krim. This week, the New York Times reports, prosecutors shared photos of the crime scene, showing the two children stabbed to death in a bathtub, blood pouring into the drain, a bloody knife left on the bathroom sink, right next to a child’s toothbrush.

Kevin Orr, a paramedic who tried to revive the little boy, testified that it was “probably the most horrendous scene” he had ever encountered.

“That’s the worse crime scene I’ve ever seen, other than Sept. 11,” said Eugene Nicholas, another paramedic.

The children’s mother, Marina Krim, made the horrifying discovery when she came home to check on her family. Ortega was reportedly stabbing herself in the neck when the mother arrived to find her children mortally wounded. Lucia had been stabbed 30 times.

According to the New York Times report, a juror asked the judge to be dismissed on Tuesday afternoon, claiming he did not believe he could be impartial. The judge granted his request.

Ortega had pleaded not guilty by reason of insanity. A paramedic testified that her self-inflicted injuries appeared to be life-threatening, and that she wasn’t breathing normally after stabbing herself in the neck.

The children left behind a sibling, Nessie, who was three years old at the time of their killing. She was with her mother when she discovered the horrific scene.

An exact motive for the murders is not clear and does not need to be proven at Ortega’s trial. Prosecutors have reportedly said she resented her employer.

[Feature image: Leo and Lucia Krim/Facebook]