Troubled solar power developer SunEdison Inc. has agreed to allow its unsecured creditors to take on the role of bankruptcy investigators, probing for grounds for potential lawsuits against directors, officers and others involved in its troubles, Dow Jones Newswires reported yesterday. The agreement was reached in talks about SunEdison's finance package, which was under attack from junior creditors wary of allowing the company to go even deeper in debt. SunEdison was carrying $16 billion in debt when it filed for chapter 11 protection in April and under investigation by the Securities and Exchange Commission and the Justice Department.