The latest: investigators work to reconstruct what happened at military installations

Law enforcement work around the Chattanooga Police's bomb squad truck.
photo Michael Hart, a Navy veteran who served in Vietnam, kneels at a memorial outside the Marine Corps Reserve Center on Amnicola Highway on July 18, 2015.

9 p.m.

The mother of one of the Marines slain in Tennessee Thursday visited the memorial garden at the metro Atlanta high school that her son attended.

Cathy Wells visited the memorial dedicated to her 21-year-old son Lance Cpl. Skip Wells at Sprayberry High School on Saturday. Wells graduated from the Cobb County school in 2012.

Andy Kingery, a spokesman for Wells' family said, "Cathy was able to soak in the loving tributes left by so many. We have collected many of the sealed letters and items to keep forever."