December 19, 2016 6:50 pm Arborists Investigate Tree Falling on Wedding Party Arborists were investigating what caused a tree to topple on a wedding party, killing the bride’s mother. Jane Yamamoto reports for the NBC4 News on Monday, Dec. 19, 2016. US & World Videos 2:42 Executive staff to LA County DA accused of mishandling confidential police files 2:58 UC Irvine students launch solidarity encampments 2:36 Student's mother tries to stop vandalism at USC 3:45 Walkout supporting pro-Palestinian protesters at UCLA 3:22 USC activists request emergency campus student dialogue