Violent crime is up 27 percent across the city so far this year, compared to the same period last year, according to new numbers from the Los Angeles Police Department. Within that, the biggest spike has been in aggravated assaults. And the neighborhood that’s seen the biggest jump is in and around Skid Row. There, violent crime’s gone up 73 percent, almost three times more than in the rest of the city. What’s driving the numbers?