It looks like the arrest is related to a preexisting warrant:
The baby’s father, 23-year-old Willie Wilson, is in jail right now on unrelated drug charges. He was arrested around 9:40 p.m. Wednesday for possession of marijuana. A warrant had previously been issued for his arrest.
http://wishtv.com/2014/08/28/search-continues-for-1-month-old-taken-from-dad-at-gunpoint/
The baby’s father, 23-year-old Willie Wilson, is in jail right now on unrelated drug charges. He was arrested around 9:40 p.m. Wednesday for possession of marijuana. A warrant had previously been issued for his arrest.
http://wishtv.com/2014/08/28/search-continues-for-1-month-old-taken-from-dad-at-gunpoint/