(CBS) Survivors of the Batman movie massacre, and relatives of the 12 people who were killed, heard more graphic testimony Tuesday at a preliminary hearing for accused gunman James Holmes.

Survivors, victims' family members, and spectators returned to the courthouse to hear the second day of testimony at James Holmes' preliminary hearing. The week-long proceeding will determine if there is enough evidence to bring the 25 year old suspect to trial for the Colorado movie theater massacre.

During the first day of testimony, Holmes listened attentively, and never looked at the shooting survivors, or family members of the 12 people who were killed. Some spectators sobbed as police officers broke down in tears on the witness stand, describing the horror they saw as they arrived at the theater.

Security remains extremely tight at the courthouse in Centennial, Colorado. Officers are stationed on the rooftops, and spectators have to get scanned twice as they head into the building and again before entering the courtroom.

“It was gut-wrenching, it really was,” Mary Ellen Hansen, a victim’s relative said.

A great aunt of six year old victim, Veronica Moser Sullivan is among the family members who have been coming to court, hoping to see Holmes brought to justice.

The father of 24 year old victim Alex Teves had a message for Holmes. “If I could say something to him, I'd ask him to be courageous and kill himself.”

Police revealed that Holmes purchased his ticket to the midnight showing of the latest Batman movie 12 days before the shooting. They say surveillance video shows him holding the door open for a couple as they entered the theater. The hearing could set the stage for an insanity defense, or possibly a plea agreement.

Prosecutors have not decided if they will seek the death penalty against Holmes if he is convicted.
Second Day Of Testimony In Holmes' Preliminary Hearing