This was carefully planned and took place at the same time as the boston marathon bombing.
New information as well as old information was contained in this report by Jed Babbin, who previusly served as Deputy Undersecretary of Defense under George H.W. Bush.
#1 the firing began and ended with a flashlight signal.
#2 that 110 of 120 shots hit the targets, empty casings were wiped clean of DNA.
#3 at about 1 a.m. on that April 16, someone cut the telephone lines at 2 separate locations
which go to the substation’s location in a manner calculated to be hard to repair.
#3a The weight of these manhole covers required more than one perp for assistance.
The original report indicated debris was redistributed so they would not look like they had been distrubed .
#4 Piles of stones were markers of optimum shooting efficientcy, with locations for maximum damage.
#5 the perps left long before the police arrived,indicates a fairly high level of discipline, training, and skill.
Since the Federal investigation is continueing , there has been no determination that this was a terrorist incident.