Sills also offered new information on what the two inmates did Tuesday after the shooting, which happened around 6:45 a.m.in Hancock County.
Investigators in Georgia say they found the green Honda stolen by two prison inmates who killed two guards and escaped on Tuesday.
In a noon news conference Thursday, Putnam County Sheriff Howard Sills responded to a question about officers' safety in a potential shootout as they hunt for Ricky Dubose and Donnie Rowe by pointing to the black memorial band on his badge.
"My biggest worry is they're going to kill somebody else", Sills said.
The two men are wanted for reportedly killing two Georgia state prison guards on a bus before fleeing in a stolen vehicle earlier this week.
They "murdered two corrections officers in a brutal fashion", Sills said.
They then stole a white Ford pickup truck and later hijacked a Honda Civic, which was discovered hidden in a wooded area on Wednesday.
Sometime that night, a white F-250 was stolen in the Seven Islands Road area of Morgan County. "Literally every law enforcement agency in the state - local, federal and state is involved".
Sills described the fugitives as violent repeat offenders who are extremely risky, having taken the guards' 9 mm pistols.
It is said that the prisoners overpowered both the guards and one convict killed both the prison guards after disarming them.
Dubose could have trouble hiding his prominent tattoos, which include a crown above his right eyebrow and a star below his right ear, the word FACE above his left eyebrow, and graffiti-style letters across his neck.
Officials said Dubose, almost 20 years his junior, is also a hardened criminal despite his relatively young age, and is a member of the notorious "Ghostface Gangsters" white supremacist group.
Both Rowe, 43, and Dubose were convicted of armed robbery and other violent crimes, and have been cellmates a few times in Georgia's prisons. Born in 1973, Rowe was being held for life without the possibility of parole for multiple armed robbery convictions in Bibb County from October 2001. "If anyone sees them or comes into contact, they need to call 911 immediately", the sheriff said.
Numerous 31 inmates who stayed behind knew little of Rowe and Dubose since they came from different prisons or different areas of Baldwin State Prison, where Rowe and Dubose had been housed until that morning.