Pictures from investigation into doctor's death

<div class="meta image-caption"><div class="origin-logo origin-image none"><span>none</span></div><span class="caption-text">Colleagues of Dr. Melissa Ketunuti from Children&#39;s Hospital of Philadelphia held a candelight vigil for her on Thursday, January 24, 2013.</span></div>
January 24, 2013 7:38:22 PM PST