'Cop Killer' Suspect Connected to Another Bank Robbery As authorities continue a nationwide manhunt for a suspected cop killer, law enforcement officials have revealed that the suspected killer and bank robber had attempted a previous bank robbery just before the deadly attack. Just hours before the suspect robbed a bank and shot two police officers in Tupelo, Miss., authorities say he attempted another robbery in Atlanta, nearly 300 miles away. According to officials, after trying to unsuccessfully rob a Bank of America with a gun, the suspect then walked outside and mugged a person at the ATM. FBI Special Agent Steve Emmett told reporters the security camera images of the suspect in Atlanta were similar to those in Tupelo. "Same individual, same day, it's a violent robbery," said Emmett. On Dec. 23 Officer Gale Stauffer and a second officer were shot when they confronted the alleged robbers at a railroad crossing as they made their escape. Stauffer died of his injuries and the other officer remains in the hospital in serious condition. The FBI and local police have launched a nationwide dragnet to find unknown suspects, and according to ABC News affiliate station WAPT a reward of $200,000 has been offered to anyone with information leading to the arrest of the suspects. Earlier this week residents in Tupelo, Miss., held a candlelight vigil for Officer Gale Stauffer. "I'm at peace knowing Gale died doing what he loved," said his wife Beth Stauffer. A funeral service for Stauffer took place on Friday. Vigil Held as Manhunt Goes Nationwide