https://www.npr.org/2019/01/08/683205814/fact-check-trumps-oval-office-pitch-for-a-border-wall
Claim 3: ICE arrests
"In the last two years, ICE officers made 266,000 arrests of aliens with criminal records including those charged [with] or convicted of 100,000 assaults, 30,000 sex crimes and 4,000 violent killings. Over the years, thousands of Americans have been brutally killed by those who illegally entered our country."
Fact check:
The president is right about the total number of arrests of immigrants with criminal records that ICE has arrested over the past two years. But that number alone is misleading, because many of those of immigrants have very likely committed immigration-related offenses rather than violent crimes as the president is suggesting.
Trump has frequently pointed to sympathetic crime victims to justify his crackdown on illegal immigration. But experts say the president's rhetoric overstates the threat posed by immigrants, who tend to commit crime at lower rates than people who are born in the United States — including murder and other violent crimes.