Dallas on edge as police search headquarters for suspicious man amid fresh threats

Police receive anonymous threats and scour building with Swat teams and dogs but fail to find suspicious person Dallas police have said a suspicious man spotted around the department's headquarters after threats were made against officers could not be found during a search operation on Saturday evening. Amid heightened security, Swat team officers and dog units scoured a multi-level parking garage connected to the police building. An explosive device and a shotgun were used to gain entry to lock...