(GRAPEVINE, Texas) -- Police released audio Wednesday evening from a 911 call they believe was placed by the gunman who allegedly killed seven people, including himself, in Grapevine, Texas, when he entered a house dressed as Santa Claus Christmas morning.
Authorities believe Aziz Yazdanpanah, 56, made the call from his estranged wife's apartment after killing her and two of his children, along with three other relatives. He later took his own life.
In the recording, the caller can be heard whispering to the 911 operator "Help. Help," and later saying "I'm shooting people."
Police said special equipment had to be used to decipher what the caller was saying.
"The newly discovered audio was not heard on the original audio software over many playbacks, and was not heard/understood by the dispatcher who took the call on Sunday," Grapevine police spokesman Lt. Todd Dearing said in a statement.
Meanwhile, a candlelight vigil was held in Grapevine Wednesday night to remember the victims of the shooting.
Listen to the 911 call below, posted by ABC News affiliate WFAA-TV:
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