From The Washington Post:
"Trump told the sheriffs, “the murder rate in our country is the highest it’s been in 47 years.” He blamed the news media for not publicizing this development, then added, “But the murder rate is the highest it’s been in, I guess, 45 to 47 years.”
The country’s murder rate is not the highest it’s been in 47 years. It is almost at its lowest point, actually, according to the FBI, which gathers statistics every year from police departments around the country."