From The Philadelphia Inquirer Forty years after Denise Pierson was found beaten to death along an isolated railroad track in Marcus Hook, investigators announced Friday that they arrested one of the men they believe was responsible. Wayne Anthony Walker, 58, of Linwood, was charged late Thursday with murder, kidnapping, conspiracy, and related offenses. He remained in custody, denied bail. Pierson, 18, was reported missing from her home in Marcus Hook in April 1981. Her body was found three years later on the tracks at Seventh and Market Streets, and an autopsy determined she died from blunt-force injuries to her head, according to court documents. Walker was long considered a suspect in Pierson’s death, and over the years he gave interviews to State Police detectives probing the case. But it wasn’t until the State Police reopened the investigation into Pierson’s murder in 2018, with assistance from the Delaware County District Attorney’s …