Three people who prosecutors say blew up a house and devastated an Indianapolis neighborhood in an insurance fraud plot are set to appear in court on charges of murder and arson. A pretrial conference will be held Wednesday in Marion County Court for Monserrate Shirley, her boyfriend, Mark Leonard, and his brother, Bob Leonard. The three are charged in the Nov. 10 explosion that killed a couple who lived next door and destroyed five homes, including Shirley’s.