They include both individuals convicted of first-degree murder, which is intentional killing, and those found guilty of second-degree or “felony” murder, a charge applied to any individual who participates in a felony that results in death. Among those second-degree cases are Michael Helwig, a Pottstown man who was involved in a 1982 attempted robbery in which a codefendant shot and killed a man outside a pancake house; Thomas Schilk, who tied up a man in his apartment and took the man’s wallet, but was not present when the man fell from a third-floor window and died in 1984; and David Sheppard, who was convicted in a 1992 robbery of an Overbrook pharmacy in which a codefendant shot and killed the pharmacist.