NORMAN - Authorities arrested a man in Norman today in connection with the stabbing death of his mother last year. Norman police helped OSBI agents take 26-year-old Lee Purser into custody about 5 p.m. at an eastside apartment complex. Purser is suspected in the fatal stabbing of Pamela Purser , who was found dead inside her Lone Grove home on June 17, 2007. Brown says Pamela Purser was killed in front of her 2-y...