MORE:
http://lancasteronline.com/insider/friends-family-seek-answers-on-why-columbia-teenagers-shot-at/article_402660b8-5845-11e6-a31f-cf7630330579.html
The article also states:
"In August 2015, he was involved in afight over a Confederate flag at Sixth and Locust streets. Rentas removed a flag from the back of a truck, his mother confirmed Monday afternoon."
(Actually, the incident occurred at Sixth and Walnut. Columbia Spy first made the connection between the two incidents in a previous article.)