The shooting happened around 8:30 p.m. on July 22, 2018, at a packed DMB Billiards on Main Street in Port Jefferson.
Police say 27-year-old Albert Luis Rodriguez-Lopez became involved in an argument with 37-year-old Alejandro Vargas-Diaz and was fatally shot in an incident that was caught on surveillance video.
WATCH: New video released, reward offered in pool hall murder investigation
The front window of the hall was shattered in the shooting, sending patrons fleeing to safety.
Rodriguez-Lopez, a father of three young children, was shot three times -- twice in the back.
"My heart is broken, and I wait for that moment when they catch that guy," mom Luz Lopez said. "Because nobody's happy now. Look at those children now, asking for their father...I will only have peace when I know the guy is in jail."
The search has covered New York City, parts of New Jersey and Connecticut, as well as the Dominican Republic. Vargas-Diaz was last seen outside the LIRR's Jamaica Station on the night of the shooting, but he has not been seen since.
The pool hall has since closed.
Suffolk County Crime Stoppers is now offering a $5,000 fast cash reward for information leading to Vargas-Diaz's arrest.
Anyone with information about these incidents can contact Suffolk County Crime Stoppers to submit an anonymous tip by calling 1-800-220-TIPS, texting "SCPD" and your message to "CRIMES" (274637), or by email at www.tipsubmit.com.
All calls, text messages and emails will be kept confidential.
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