Struggling to police threats on social media

US law enforcement agencies are a long way from being able to effectively track threats of the kind a gunman posted on Instagram before his execution-style murder of two New York City policemen last weekend.

Police need more data analytics and mining software to monitor social media sites such as Facebook and Twitter, as well as trained personnel to make sense of what could be a deluge of data, say law enforcement officials and security experts.

“You can buy all the technology you want, but if you want to figure out clever stuff, you better have smart people able to use it,” said Christopher Ahlberg, co-founder of Recorded Future, which helps clients analyse social media feeds. The company is partly backed by In-Q-Tel, a venture capital firm that serves US intelligence agencies.