Joseph Ralph Dwyer

Joseph Ralph Dwyer is the main antagonist of the direct-to-video 1988 horror film "555".

History
(taken from wikipedia)

A knife and machete-wielding man dressed like a hippie is on the lose.he attacks a couple and,After beheading the man with the machete, the hippie slashes the woman to death with the knife, then sexually assaults her corpse. Charged with solving the murders are Sergeant Connor and Detective Haller, whose main suspect is the man who found the bodies, a retired army colonel named Peter Wayne. Routinely intruding upon the investigation is stubborn local reporter Susan Rather, the occasional lover of Assistant District Attorney Ralph Kennedy.

Over the next two nights two more couples are butchered, one in their van, and the other in an abandoned factory. The modus operandi (male killed with a machete, the female killed with a knife and raped post-mortem) is the same, and the theory that Wayne is the killer is strengthened when he goes into hiding. Shortly after another couple is killed (this time in their bedroom) on the fourth night, Connor finds Wayne, who he had discovered had lived in at least two of the four cities where similar crimes (five couples killed over the course of five nights, each spree five years apart) have occurred. However, due to a lack of solid evidence connecting him to any of the murders, Wayne (who claims to have only hid because he believed Connor was personally out to get him) is let go.

After Wayne's release, Connor and Haller are approached by Susan, who claims that Ralph is the Lake Front Butcher. Susan explains that she had earlier snuck into the station to look through the case files, and found out that the ex-boyfriend of the very first victim (murdered twenty years ago in Massachusetts alongside her lover) was named Joseph Ralph Dwyer, which is Ralph's birth name. Searching for Ralph, the trio track him down to the abandoned factory, where he is killed in a shootout, though only after claiming the lives of another young couple, completing his pattern for the fifth time