More than three weeks after a Brunswick couple and their adult grandson were shot dead inside their modest home on Wolfe Street, time may be running out for the killer or killers responsible, investigators said Tuesday.

Despite the time elapsed without an arrest in the triple murder, the investigation is progressing toward justice for Carson Holliman, 64, Vondell Holliman, 63, and their 24-year-old grandson, Christopher Holliman, said Stacy Carson, special agent in charge of the Georgia Bureau of Investigation’s Kingsland Office. Police found the three shot dead inside their home at 2220 Wolfe St. on Sunday, June 18, after friends from Zion Baptist Church grew concerned when the three missed the day’s service.

Both agent Carson and Brunswick Police Chief Kevin Jones referenced important evidence Tuesday that is presently being processed at the GBI Crime Lab in Savannah. Neither would discuss the evidence further, but both suggested it might reveal important clues about those responsible for the killings.

“We are waiting on crime lab results to come back,” Carson said. “I can’t get into any more detail about that right now. We still feel confident that our investigation is headed in the right direction.”

“We have not forgotten about this,” Jones said of the triple murder. “We’re just waiting for some good hard evidence (at the crime lab).”

Carson and Vondell Holliman had lived at the small wood frame home on Wolfe Street for years. Christopher Holliman, who was autistic, lived there with them while working at the Winn Dixie on Atlama Avenue and pursuing his love of gospel music by playing drums in the church choir at Zion Baptist, 1611 G St.

Christopher Holliman had last worked a shift at Winn Dixie that Friday, June 16, co-workers said. Neighbors in the block of close-knit homes on small lots did not recall anything out of the ordinary Saturday at the Hollimans’ house.

When church members could not get them to answer the door after church on June 18, Brunswick police were called early that afternoon and discovered the bodies inside.

Police and the GBI have offered a $15,000 reward for information leading to an arrest in the case. Agent Carson said many concerned residents have called in with information, though none have mentioned doing so because of the reward money.

“By no means is the case stagnant at all,” she said. “This is still very much an ongoing investigation. It’s progressing.”

Anyone with information in the case is asked to call Brunswick Police’s Silent Witness at 912-267-5516, or the GBI at 912-729-6198.