ELIZABETH, NJ - A Plainfield resident has been sentenced to 30 years in state prison after being found guilty of charges including first-degree aggravated sexual assault, second-degree sexual assault, and second-degree endangering the welfare of a child, assaulting an underage girl multiple times over the course of seven years, acting Union County Prosecutor Grace H. Park announced Dec. 15.

Clark Gilliam, 35, who was sentenced by state Superior Court Judge Stuart Peim, was arrested  as the result of a Prosecutor’s Office Special Victims Unit investigation of a case referred to it by the Plainfield Police Division, according to Union County Assistant Prosecutor Shawn Barnes, who prosecuted the case. The investigation revealed that the sexual assaults began when the victim was 6 years old, Barnes said.

Following a June 2016 trial, Gilliam was found guilty. Calling the crimes “horrible and barbaric,” Peim ruled that Gilliam must serve at least 85 percent of his 30-year term before becoming eligible for parole. Upon his release Gilliam also will be required to be registered as a sex offender under Megan’s Law and be subject to parole supervision for life.