TULSA, Okla. (KTUL) -- Accusations of missing evidence and tampering were at the center of a pre-trial hearing for Michael Bever.
He's the younger of two brothers charged with brutally killing their family members.
Bever's defense attorney said in court today that critical evidence is missing in the case.
Some of the missing items include a computer and hard drive that may contain video from the night of the murders.
"If there are communications between the district attorney and the detective who lost evidence or whatever happened to the evidence, those are going to be relevant to how that evidence was handled," Defense Attorney Corbin Brewster said.
District Attorney Steve Kunzweiler says investigators are still combing through the evidence, but so far they haven't found any video.
"We don't know if it was ever recorded, we just know there were cameras and there were computers," he said.
Brewster says the Broken Arrow Police Department hasn't handled the evidence correctly and claims evidence was found in a Broken Arrow detective's locker.
Broken Arrow City Attorney Beth Anne Childs acknowledges there is an ongoing investigation.
"Obviously based on the hearing today, there are some what I would consider to be irregularities," she said.
But the DA suggests they are hiding evidence.
"That is the last thing in the world a prosecutor would want in a case, is to hide evidence," Kunzweiler said.
Bever's older brother, Robert, pleaded guilty and was sentenced to life in prison without parole.
Michael Bever has another hearing on Feb. 23.