The Google engineer charged with murder last week admitted to beating his wife to death with his fist in their $2million Santa Clara home, court documents obtained exclusively by DailyMail.com reveal. Police noticed that suspect Liren Chen’s right hand was ‘extremely swollen and purple’ and that he had blood on his clothing, legs, arms and hands, records reveal. When fire department personnel asked the 27-year-old how he hurt his hand, he replied, ‘I punched my wife,’ and told them it happened the prior day, records state. A friend of Chen told police he’d seen Chen with his wife Xuanyi Yu...