Graphic testimony in the trial of Raeshawn Rivers continued Thursday with details from a fire investigator. Rivers, 15, is on trial for allegedly participating last year in the rape and murder of Arnesha Bowers, 16, and for then setting her body and her grandmother's house on fire. Subscribe to WBAL on YouTube now for more:http://bit.ly/1oJSRCN Get more Baltimore news: http://wbaltv.com Like us: / wbaltv11 Follow us: / wbaltv11 Google+: https://plus.google.com/+wbaltv11