Since Riley had gone to various action mission, his DNA was left behind when he was injured in one of the missions before. The Sea Country Base didn't make a move because the director didn't let them catch him.
What a joke.
He's their undercover.
But on the surface, the reason was because this is just a small 'fry' and they wanted to catch the big fish. Besides, Riley has always been careful and it was not that easy to find him in the millions of Sea Country Base's population.
Even though Sea Country Base was definitely not the most advanced country base after the International War, it was definitely ranked above the middle line. And their population was also a bit high.
"8 PM," Riley replied.
"Got it."
