COLUMBIA, S.C.—The mother of an openly gay man killed earlier this year outside a Greenville County, S.C., bar said Oct. 17 she’s outraged because she has been told the teen accused of throwing the deadly punch won’t face the stiffest charge possible.

Sean Kennedy’s mother said the chief investigator in her son’s death told her a grand jury indicted Stephen Andrew Moller with involuntary manslaughter for the May 16 death of her 20-year-old son.

Moller was initially charged with murder and has been in the Greenville County jail since turning himself in May 17.

Police have said a man punched Kennedy after saying a gay slur.

Prosecutors issued a statement Oct. 17 saying they could not confirm what the grand jury did because the panel meets in secret and did not issue its final public report before leaving for the day.

South Carolina is among five states with no hate crime laws. Arkansas, Georgia, Indiana and Wyoming are the others, according to the Anti-Defamation League.