Thomas Stack, 58 years old, had a job, a wife and a new life in a suburb in Boston.  He could not get away from the secret in his past though, even after 25 years on the run.  He was arrested by police and US Marshals Monday at his home in Massachusetts on a 25 year old child rape warrant.  Stack allegedly forced the then 14 year old girl to have sex with him inside his home.  The girl knew him from the housing project they lived in.  The girl went to police soon after the attack.  After being questioned by authorities, they charged him with a count of unlawfully and carnally knowing and abusing a girl under 16 years of age.  On April 24th, 1975, a judge imposed a $500 personal recognizance bond at Stack's arraignment.  He made bond that same day and disappeared the next day.  About four weeks ago a federal marshal working with the Rhode Island State Police's Fugitive Task Force received information that Stack was living in Revere, a suburb north of Boston.  Monday, at about 1:30 p.m., federal marshals, and the Massachusetts State Police Violent Fugitive Apprehension Unit, arrested Stack at his home on Edicott Street.  He is scheduled to have an arraignment hearing today in Chelsea District Court.  Stack will be returned to Pawtucket for trial.