 Complete the following phrase:  At the time of these shootings, there was already an alarming spike in ambush-style attacks, and the total number of attacks on uniformed officers was reportedly up in 2016. This was also the 60th shooting homicide of a police officer in 2016, already representing a significant increase from 2015s total of 41 officers shot and killed. San Antonio Police Chief William McManus compared the killing to the recent mass shootings in 