The reward has quadrupled in size for information leading to the arrest and conviction of the man who police said was involved in a deadly triple shooting late last month.
Police are asking for the public's help in finding 38-year-old Terrance Lamb.
Along with up to $1,000 from Silent Witness for an arrest, the U.S. Marshals is offering up $3,000 for a conviction, bringing the total possible reward to up to $4,000, police said.
Officers said Lamb left the shooting scene near 16th Street and Southern Avenue on June 25 around 4:45 p.m. in a white 1997 Chevy Express van with the Arizona license plate CJK-2031.
[ORIGINAL STORY: Police: 2 dead, 1 hurt after shooting at south Phoenix home]
Two of the victims of the shooting 28-year-old Ja'Cory Ranger and 35-year-old Ricky Elam, Jr., died at the home.
A third victim, who hasn't been identified, was found at the hospital but he survived his injuries.
Police have not said what led up to the shootings or a possible motive.
Anyone with information is asked to call Silent Witness at either 480-WITNESS (948-6377) or 1-800-343-TIPS (8477). Spanish speakers may call 480-TESTIGO (837-8446). (Click or tap phone number to call from this story on your mobile device.) Callers can remain anonymous and could earn a reward of up to $1,000.
Copyright 2018 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.