Complex sentence: Vrinks and his team stake out the factory, with Klein's team acting as backup, but after patient surveillance, when on the verge of catching the robbers, Klein ignores procedure, and drunkenly comes out of hiding.
Split into simpler sentences: Vrinks and his team stake out the factory, with Klein's team acting as backup. But there, after patient planning and surveillance, when they are on the verge of catching the robbers, Klein ignores procedure, and drunkenly comes out of hiding.