The 7-year-old passed away last month after battling a rare kidney cancer.
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READ MORE: 7-year-old cancer patient and honorary Freeport officer Abigail laid to rest
She had dreams of becoming a police officer.
Garivey says his wife and daughter recorded a message from Abigail before she died.
ORIGINAL STORY: 6-year-old girl with cancer sworn in as honorary police officer in Freeport
They had the waveform of Abigail's recording printed on a photo of her with the chief. When it's scanned, her voice can be heard.
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His granddaughter gave the photo to him as a Christmas present.
"Chief I love you, stay relentless," Abigail can be heard saying in the recording.
Garivey posted a video of him receiving the gift on Facebook.
He cried as he heard Abigail's voice saying, "I love you too baby...I miss you kid" back to her message.
WATCH: 7-year-old who battled cancer remembered for her toughness, spirit
7-year-old who battled cancer remembered for her toughness, spirit
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During her funeral, other officers gathered to pay tribute.
They helped create the Officer 758's Cancer Fight Fund.
It's a charity that shares her badge number and now comforts children battling cancer.
RELATED: Officer Abigail's family starts non-profit to help children with cancer