As the trial of Ft. Hood shooter Nidal Hasan continues, agaonizing stories from survivors and families struggling four years after the massacre emerge.
CNN's Ed Lavandera reports.
The jury hears emotional testimony from a dozen witnesses, relatives of those killed and also victims who survived the spray of bullets.
Staff Sergeant Patrick Zeigler was shot 4 times, once in the head. Doctors had to remove 20-percent of his brain. Zeigler says he's retiring from the Army in October but fears he'll never be able to hold a regular job.
He told the jury, "It's affected every facet of my personality. I am a lot angrier, a lot darker than I used to be."
21-year-old Private Francheska Velez was pregnant when Hasan gunned her down inside the Ft Hood medical processing building. Other survivors said they could hear her screaming "My baby! My baby!" before her voice was silenced.
Her father, Juan Velez, testified "This man did not just kill 13 people. He killed my grandson and he killed me slowly."
For the first time in court, Lavandera reports, Nidal Hasan appeared flustered, repeatedly asking the judge for breaks during the testimony.
A jury will soon decide if Hasan will be sentenced to die or spend the rest of his life in prison.