So sad, 15 officers were shot and killed in ambush attacks, more than any other circumstance of fatal shootings in 2014.
Check it out:

With 2014 almost over, 126 law enforcement officers have died in the line of duty in this country, a 24 percent increase from the 102 who died in 2013, the National Law Enforcement Officers Memorial Fund announced on Tuesday.

Gun-related incidents were the leading cause of death, accounting for 50 deaths, a 56 percent increase from the 32 officers killed by gunfire in 2013. Although firearms fatalities increased in 2014, they remain below the decade average of 53, the report noted.