Four people were arrested for the murder and dismemberment of model and influencer Abby Choi after parts of her body were found in a Hong Kong rental unit, local police said Saturday. Choi’s ex-husband, 28-year-old Alex Kwong, was arrested early Saturday afternoon at a ferry terminal on the northwestern coast of Lantau Island, Hong Kong. He was carrying 500,000 Hong Kong dollars in cash (approximately $63,700) and several luxury watches worth about HK$4 million ($510,000), according to The South China Morning Post. Investigators believe he was trying to flee Hong Kong when arrested. Kwong’s pa…