WICHITA, Kan. -

A funeral mass for the second victim in a double-shooting will be Saturday, according to Downing and Lahey mortuary.

Roger Bluml died Saturday morning from his injuries, according to Sedgwick Co. Sheriff Jeff Easter.

Bluml and his wife, Melissa, were shot last month at their home near Valley Center. Melissa Bluml died of her injuries that night.

Marc Bennett, Sedgwick County District Attorney, is expected to announce possible changes to charges this week. Bennett was awaiting autopsy results, which were complete Tuesday.

The Bluml's adoptive son, Tony, his biological mother and two of his high school friends were arrested in the case and all face numerous charges.

Firearms and cartridge casings were collected on the scene of a double-shooting that killed a Valley Center woman, according to court documents.

Four people have been charged with murder, including the couple's adopted son, Anthony. His biological mother Kisha Schaberg also faces charges. The charges also include robbery and burglary.

Investigators have revealed little details of what led up to the shooting. But court documents found that detectives spent several days collecting evidence both at the Bluml home, and at a Sedgwick County park.

In a motion from the state, documents showed "firearms and cartridge casings were collected" and "a purse and what appears to be a long-sleeved shirt/garment were recovered with one of the firearms."

The items contain DNA evidence that prosecutors want to test, but the court papers reveal there's only enough biological material for one set of tests.

The defense will have its own forensics experts present when the testing take place, according to the documents.

The judge has ordered blood and saliva samples from Anthony Bluml, Kisha Schaberg, Drew Ellington and Braden Smith, defendants in the case.

A preliminary hearing was expected to take place Tuesday, but has been continued to Jan. 23.