Final answer:
The prosecution in the trial was trying to prove that the defendant committed a carefully planned and cold-blooded murder. The question doesn't provide the information needed to address what the security chief said regarding the gated community's security.
Step-by-step explanation:
In the trial outlined, during the morning portion, the prosecution aimed to prove that the case was one of a deliberately planned, premeditated, and cold-blooded murder, committed with extreme fiendishness. This viewpoint held by the prosecution and the majority of the community was a reaction to the horrible nature of the crime. The identity and testimony of the security chief are not mentioned in the question or the reference information, therefore I am unable to provide details about what was said about the gated community's security.
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