American Po (林博文, 美國博仔), so called because he was the son of an American GI and a Taiwanese nightclub hostess, was a mixed-race Taichung gangster active in the 1980s (Heijin, Chpt 5, p 89). His deadbeat father was in the US Air Force, and his mom, who was 16 at the time, abandoned him or left him to live with his grandmother (uncertain). At a young age he became a member of the 15 Divine Tigers (十五神虎幫), a triad gang that had been active in Taichung City since the 1960s. After that the story is a bit muddled, but after a shootout with Yan Qing-biao’s men (the well-known thug who runs the Ma Zu temple in Dajia) and the police, he was executed by state. There was a film made about him in Taiwan “槍擊犯變英才” (臺灣電視公司, 1985/05/22: Wiki) and one in HK called《美國博仔》 (1991/full film, which is terrible, in mandarin). Found this crappy TW documentary about him too, and also this article is informative.
*Interestingly, there is also an online book called <中台灣黑道風雲> (in 105 chapters!) by a guy called Yue Zhongxing (岳中興 which I assume is a pseudonym) documenting organized crime activities in my adoptive city.