PORTLAND (WGME) — The man charged with murder decades after the death of his infant son pleaded not guilty in court Wednesday. A grand jury indicted Burton Hagar last week. Wednesday he faced a judge for the nearly 38-year-old crime.This is the oldest “cold case” state police say they’ve resolved, but prosecutors are tight lipped about what new evidence led to this murder charge. They say it will all come out at a future date and they’re confident they’ll be able to prove their case. Burton Hagar made his first court appearance nearly 38 years after prosecutors say he killed his 4-month-old son, Nathan. The 62-year-old showed no emotion as he pleaded not guilty to murder. State police say … read the rest of the story