A second suspect was arrested and charged with murder Wednesday in the shooting of a man in Brockton on May 14, said the office of Plymouth District Attorney Timothy J. Cruz. William J. Allen-Robinson, 21, was arrested in Waltham and charged with killing Charles Evans, 45, Cruz’s office said. Evans was found shot several times around 4:09 p.m. and was pronounced dead at a hospital, Cruz’s office said. Allen-Robinson is to be arraigned Thursday in Brockton District Court. Donta Hood, 22, was also charged with Evans’s slaying on May 17.Derek J. Anderson can be reached at email@example.com.