As police investigate the destruction of mature trees in downtown Los Angeles, the blatant vandalism has reignited concerns about the city core's decline.

The authorities said a man used a chain saw to destroy more than a dozen trees in downtown Los Angeles, an attack that saddened and rattled residents and city leaders.

In announcing charges filed against the 44-year-old homeless man accused of cutting down trees in downtown Los Angeles, officials said the damages will cost the city hundreds of thousands of dollars.