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A shocked courtroom heard Derek Rosa tell police he stabbed his mother to death in her sleep as his baby sister slept next to her in the bed.\\xa0

After hearing the teen\'s taped confession, Miami Dade Circuit Judge Richard Hersch rejected a defense motion to move Rosa out of the adult jail and into a juvenile facility. \\xa0The defense says it is unconstitutional to keep Rosa in an adult cell, claiming he is being kept in unsustainable conditions and is only allowed outside the cell for 20 hours a week.

\\xa0After rejecting the motion, the judge orders Rosa to be held in the Miami-Dade Metro West Detention Center until his unscheduled trial begins.\\xa0\\xa0

Reportedly, the night Derek Rosa stabs his mother to death, he makes six Google searches including,

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• \\u201cWhat is the best place to stab someone?\\u201d\\xa0 "
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• "Is a small knife good for killing?\\u201d \\u201c
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• "Is it easier to kill someone with a small knife?\\u201d
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• \\u201cCan a knife cut through bone?\\u201d
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He also searched for an image of The Carotid Artery diagram. \\xa0The DailyMail reports the last search made that night was to inquire about a machine gun.\\xa0

Derek Rosa claims in a police interview that his stepfather owns two guns and he planned to shoot himself after the stabbing but didn\'t go through with it.

Joining Nancy Grace Today:

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• Matthew Mangino\\xa0\\u2013 Attorney, Former District Attorney (Lawrence County); Author: \\u201cThe Executioner\\u2019s Toll: The Crimes, Arrests, Trials, Appeals, Last Meals, Final Words and Executions of 46 Persons in the United States;\\u201d Twitter: @MatthewTMangino
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• Caryn L. Stark\\xa0\\u2013 NYC Psychologist, Trauma and Crime Expert; Twitter: @carynpsych, Facebook: \\u201cCaryn Stark\\u201d
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• Pat Diaz\\xa0\\u2013 Former Miami Dade Police Homicide Detective, Private Investigator in South Florida
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• Dr. Kendall Crowns \\u2013 Chief Medical Examiner Tarrant County (Ft Worth) and Lecturer: University of Texas Austin and Texas Christian University Medical School
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• Alexis Tereszcuk\\xa0\\u2013 CrimeOnline Investigative Reporter, Writer/Fact Checker at Lead Stories; Twitter: @swimmie2009
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