When Giardello and Russert are talking outside, his runners start out as Adidas and end us as Nike.
Felton is continually frustrated by not being able to find where his wife took his kids. But his son called him at the police station, Felton could have contacted the Baltimore police switchboard and gotten the number that his son called from, from there it would be easy enough for a police detective to find the physical address of that number.