Complex sentence: The Waltham 9/11 murders are a triple homicide committed in Waltham, Massachusetts on September 11,2011 and, as of April 22,2013, suspected of being linked to the Boston Marathon bombings.
Split into simpler sentences: The Waltham 9/11 murders are a triple-homicide committed in Waltham, Massachusetts on September 11,2011. As of April 22,2013, the murders are suspected of being linked to the Boston Marathon bombings.