Martin Duram was shot and killed in his Michigan home in May, 2015, and his parents believe their son's pet parrot knows who killed him.

"That bird picks up everything and anything," Martin's mother, Lillian Duram, told WABC-TV. "And it's got the filthiest mouth around."

The African grey parrot, named Bud, was recorded in a video several weeks after the shooting mimicking what sounds like an argument between a male and female voice. African grey parrots are known for their ability to "talk," mimicking human voices and other noises with great accuracy.

Lillian and Charles Duram say the parrot is repeating an argument that took place between their son and his wife, Glenna. The parrot ends the argument by saying, in what they believe to be Martin's voice, "Don't f---ing shoot."

"I personally think he was there and he remembers it, and he was saying it," Charles told WABC.

Martin was shot five times and his wife was shot once, in the head, in their home in Sand Lake last year. State police have identified Glenna as a possible suspect in what they believe to be a murder-attempted suicide.

According to WOOD-TV, Glenna left three suicide notes in the house, and the gun used to kill Martin belonged to the family. Police records show the family was having financial problems and gambling problems.

No one has been charged in Martin's death, however. After her recovery, Glenna told police that she did not kill her husband, and had no memory of the shooting.

Police records show that a request was made to use the parrot as evidence, but Michigan attorney Michael Walsh told WOOD-TV that Bud would be inadmissible because there's no way to figure out where he heard the argument.

"How did it get there?" Walsh said. "If there's no reliable way of making that determination, you can't rule out that the bird witnessed a homicide or that the bird witnessed something on TV."

The prosecutor in the case told WABC he plans to make a decision on charges in two to three weeks.

Charles told WOOD-TV he there's some evidence still out there that "can change this whole situation."

Lillian is not as optimistic, and firmly believes Glenna is guilty, telling WOOD-TV, "The b---- did it."