Wiggins School of Law. Mr. Avery is a native of Onslow County, North Carolina with networks throughout the local health, academic and construction industries. Trevor’s practice includes criminal defense in both Onslow and Duplin counties, and he serves as a parent and Guardian Ad Litem attorney in DSS court. He also continues the firm’s family law practice representing clients in divorce, separation and child custody cases as well as in landlord/tenant and consumer affairs matters.