Fully research the Nitro Splicer

Completely finish all five levels of research for the Nitro Splicer. These splicers are the ones that throw grenades at you and carry around boxes of grenades. Take lots of pictures of them to get through the levels. Higher grade photos give you more points. You can take multiple photos per splicer, but the grade of each subsequent photo drops. You get a maximum of three or four photos per splicer.