Well, by the end of this excellent story it has very definitely touched him through his exposure to violence and murder and other terrifying activities that he has never been exposed to before. Consider what he witnesses when the soldiers catch and abuse the veiled woman before killing her:
The bare-chested soldier pushed her. She fell on her face and lay still. The lights changed over the forest and for the first time Omovo saw that the dead animals on teh river were in fact the corpses of grown men. Their bodies were tangled with riverweed and their eyes were bloated. Before he could react, he heard another scream. The woman was getting up, with the vile in her hand. She turned to the fat soldier, drew herself to her fullest height, and spat in his face. Waving the veil in the air, she began to howl dementedly.
Consider what Omovo witnesses. He discovers that the bodies on the riverside are actually those of people, not animals, and also observes the way that the soldiers abuse and then shoot in cold blood a woman who is only helping poor refugees from the war. Omovo observes many things that force him to grow up very quickly and face the bloody and brutal realities of civil war. His life is very definitely touched as a result.