LOS ANGELES - Two-and-a-half minutes, in and out. Just 150 seconds to smash a store's glass door or window with a hammer, fill up a suitcase with designer sneakers, jewelry, cash or cellphones, and run outside to a getaway car. Brazen thieves and looters used as cover mainly peaceful protests against police brutality in the Los Angeles region in late May and early June to systematically steal from mom-and-pop shops and big box stores alike, leaving behind thousands of dollars of damage. More than 50 people have been arrested so far through the work of the regional "Safe LA Task Force" that was established to track down the criminals. Among the most notable cases, LA detectives arrested a man in connection with the attempted killing of four officers on May 31 while another investigation resulted in federal arson charges against a man who allegedly poured flammable liquid across a pizzeria before setting it aflame, causing more than half a million dollars in damage. "