The juror raised his concerns on the 10th day of proceedings in Miami-Dade, according to Judge Marisa Tinkler Mendez. He said he was having trouble sleeping and thinking about the case in the early hours of the morning. He also told the court that his spouse had been suffering migraine headaches.

The juror asked whether it would be appropriate to create a fundraising page for the victims and questioned the public cost of the trial. Mendez said she had not encountered a situation like this in her career. She dismissed him, and he will not serve among the 12 jurors who will recommend Sierra’s sentence.

Sierra admitted to killing his wife, Gladys Machao, and her daughters, Julia, 6, and Daniela, 3, in 2012. Prosecutors say he killed them after suspecting Machao of infidelity while the couple was separating. The family’s bodies were found in a closet in their former home.

The defense has argued that a severe childhood brain injury affected Sierra’s behavior and decision-making. The injury followed a car crash in 1996, a few months after he moved to the United States from Cuba. Prosecutors dispute that the injury prevented him from understanding or controlling his actions, pointing to evidence they say shows planning and efforts to mislead investigators and relatives after the killings.

During testimony, neurologist Erin Bigler, who reviewed Sierra’s brain scans but did not examine him, agreed with a prosecutor that planning how to cover one’s tracks after a crime requires executive function.

The trial was scheduled to continue Thursday, with closing arguments set for Monday. The jury will recommend life in prison or the death penalty; the judge will make the final sentencing decision.