HUTCHINSON -The defense for a Hutchinson teen accused of killing his mother and sister is requesting more time for the disclosure of a report from an expert they hired.

The court has allowed the defense for Samuel Vonachen to file a notice of mental disease or defect as a defense in the case.

The teen’s attorney, John Henderson says that they have hired an expert to testify, but given her schedule and prior obligations, she won’t be able to meet with Vonachen until early next month so the he asked for it to be extended to Oct. 26.

Vonachen is charged with two counts of first-degree murder, attempted first-degree murder and aggravated arson. Authorities allege Vonachen, who was 14 years old at the time, spread gas through the downstairs of his family’s home on September 26 of 2013, then set it on fire. His 11-year-old sister and 47-year-old mother died in the fire. His father, however, was able to escape.