Last November, Marine veteran Kenneth Chamberlain Sr. was killed at his home in White Plains, N.Y., by police who were initially responding to a call for medical help. Chamberlain, 68, suffered from a chronic heart condition and wore a pendant that could signal for help in case of a medical emergency. Having accidentally set off the pendant in his sleep, he was surprised when an armed police squad showed up outside his apartment early in the morning and reportedly demanded to be let in, despite his assurance that he was OK. Chamberlain grew increasingly agitated as cops allegedly swarmed his home and the clash resulted in him being shot twice in the chest. As in the case of Trayvon Martin, the incident was apparently sheltered from the media and authorities initially resisted a grand-jury probe. But as reports about the incident have become widely circulated, and at least one officer has reportedly been recorded on tape taunting Chamberlain and using racial slurs just before they broke down his door. More than four months later, a grand jury is hearing evidence regarding the incident.