A grand jury heard witness statements and expert testimony Wednesday in the case of the man killed when a crane fell on his car this summer. But the decision on whether or not to indict the crane’s operator will not come until at least Thursday morning, said Dan Cable, assistant Franklin County Prosecutor assigned to the case.Marvin Kuhn, 45, of Columbus was killed July 21 when the boom of a crane fell on his car on Lane Avenue. The crane was working on the Schottenstein Center site.Mark Burcher, 38, of Westerville, was the crane operator. Burcher was not present at the grand jury proceedings, but his lawyer, George Luther, said this was not unusual.Burcher can be indicted for involuntary manslaughter, which is a felony, said Luther.If Burcher is indicted, he will be summoned to appear in court to set a trial date.If he is indicted, he “will definitely plead not guilty” Luther said.A witness for the defense, Robert Burch, a self-employed safety consultant, said it was the site conditions and not Burcher that caused the accident.Cable said even if the grand jury decides to indict Burcher, the prosecutor’s office will not file the indictment until Thursday.PJ Dick Inc., the construction company in charge of the project, owned the crane. The company also owned the crane that damaged the Richard and Annette Bloch Cancer Survivors Plaza on Lane Avenue on May 21.PJ Dick was fined $5,625 by Occupational Safety and Health Administration in September.John Abbey, vice president and general manager for PJ Dick, declined to comment on the case.