LEADING THE DAY: Sprint will defend its case opposing the $39 billion merger between AT&T and T-Mobile in a Monday hearing before U.S. District Judge Ellen Huvelle in Washington.

Sprint has argued that the merger will have an adverse effect on competition in the wireless industry, and having the nation’s third-largest wireless company as an ally would bolster the Justice Department’s case, Bloomberg reported.

Social media used to track gangs: Police officers in Prince George’s Country are using social media to keep an eye on gang activity and, in many cases, use social media sites to track down criminals, The Washington Post reported. Even when gang members know that the police are looking for them, they often post updates letting their friends on social networks know where they are and what they’re doing. One gang member wanted for a gang-related stabbing even posted his new home town and phone number to Facebook, The Post reported.

Small-biz cybersecurity: Federal Communications Commission Chairman Julius Genachowski will join Homeland Security officials and cybersecurity professionals Monday to promote a new online security tool for small businesses. The event, held at the U.S. Chamber of Commerce in recognition of cyber security awareness month, will also feature a panel on how small businesses can become more secure.

Microsoft’s YouTube account hacked: Microsoft had its YouTube account tampered with over the weekend. All of the company’s videos were removed and replaced with a message claiming that the hacker “simply signed into my account that I made in 2006,” security company Sophos reported. Microsoft has since regained control of its account and restored the content.

The intrusion comes soon after a hacker replaced the content on the Sesame Street YouTube channel with pornographic content, raising some questions about how well brands are protecting their accounts on the video-sharing site.

Google+ privacy officer: Anne Toth is joining Google to become the chief privacy officer of Google+, she revealed in a post on the social network Friday.

Toth was formerly the chief trust officer at Google, where she was a employee for 13 years, the Hill reported.