Heinz was the son of Petra and a cop who lived in the same town as Schumann. He was very focused on moving up to a higher-ranking position, so much so that he often disregarded his mother and her loneliness. When he learned that Tenma was in his city, he became determined to apprehend him, even if it meant interrupting his mother's surgery. Schumann lectured him about the severity of the issue, and he finally stopped waving his gun around the operating table. Later, Schumann convinced him that it would be wrong to jail Tenma after everything he had done, so Heinz called his superiors and apologized, for he had "accidentally mistaken another man for Tenma because they were both Asian." (Source: Monster Wikia)