VC David Lee is suing his former partner Ron Conway for millions of dollars he alleges that Conway is withholding from him. The two of them were partners in SV Angels, which backed companies like Airbnb, Pinterest and Snapchat. Lee is also looking for a judge to rule that he will be legally owed another $15 million to $20 million in future assets. Ron Conway, one of the tech industry's most prominent and powerful startup investors, who had early stakes in Twitter, Facebook and Google, has been sued by his former partner over allegations of unpaid money from past investments.