The gunshot that left a rookie Philadelphia cop crippled 45 years ago continues to echo through the city's criminal-justice system.
But it's the man who fired the bullet - and who remains behind bars, despite having served his entire prison sentence - who now seeks a measure of justice.
William Barnes' recent appeal to the federal courts to be released from prison may not win much public sympathy for the 76-year-old inmate. It was Barnes' weapon, fired during a 1966 burglary, that paralyzed Police Officer Walter Barclay.
Barclay lived another 41 years. Yet, city prosecutors tried to turn his 2007 death from an infection into a murder case against Barnes - on the ground that the ex-cop's medical problems stemmed directly from the shooting.