Acen King, 3, was shot and killed Saturday while riding in the back seat of his grandmother’s car. 
 
 The reward amount has grown to $40,000 for information in the death of a 3-year-old boy who was shot while traveling to a west Little Rock shopping center with his grandmother. 
 
 The FBI's Little Rock office said Monday that it would offer a $20,000 reward, adding to a $20,000 reward previously offered by the Little Rock Police Department. 
 
 Police say the killing resulted from a road-rage incident Saturday night involving the driver of an older model black Chevrolet Impala and 3-year-old Acen King's grandmother, 47-year-old Kim King-Macon. 
 
 A person inside the Impala honked at King-Macon, who was waiting to turn westbound on to Mabelvale Cut Off Drive from Warren Drive in her 2006 Dodge Charger, the Arkansas Democrat-Gazette previously reported. 
 
 [INTERACTIVE: Map details all Little Rock killings so far this year] 
 
 King-Macon then honked her horn, angering the Impala’s driver, described as a black male, who then exited the vehicle, fired one shot and fled, police said. 
 
 Once King-Macon arrived at the JC Penney at the Shackleford Crossings shopping center, believing that no one had been shot, she discovered that Acen was slumped over in the seat with a gunshot wound, the grandmother told authorities. 
 
 Acen was taken to Arkansas Children’s Hospital in Little Rock, where he was later pronounced dead. 
 
 Anyone with information regarding the city’s 40th homicide of 2016 is asked to call the FBI at (501) 221-9100 or Little Rock police at (501) 371-4636. 
 
 Read Tuesday's Arkansas Democrat-Gazette for full details. 

 Authorities increased a reward to $40,000 on Monday in the hunt for an Arkansas gunman who killed a 3-year-old child when he apparently opened fire on a car because of a stop sign delay. 
 
 The rewards by the city of Little Rock and the FBI come two days after the child, Acen King, was fatally shot while in the backseat of a car being driven by his grandmother, in a shooting described by police as a random act of "road rage." 
 
 The shooting was reported outside a shopping center at around 6:20 p.m. Saturday. The child was rushed to a hospital and later died, police said. Audio of a 911 call that was released Monday gave a clearer account of how the shooting unfolded. 
 
 Acen King, 3. Courtesy of the family 
 
 "Acen has been shot. Oh, my God!” the child’s anguished grandmother, Kim King-Macon, told police in the call. 
 
 "I was at the stop sign and the guy blew a horn at me and I blew it back, and he shot, but I thought it was in the air. He shot at the car!" she said in the call. 
 
 It is the second time in less than a month that a child was killed in Little Rock after someone opened fire into a vehicle, police said. There have been no arrests in either case. 
 
 King-Macon didn’t know her grandson was shot until she got to the shopping center. A police spokesman said that she is "completely innocent" in the incident and that neither she nor the child had any relationship to the shooter. 
 
 "It should shock all of our conscience," Little Rock Police Chief Kenton Buckner said. He made an appeal that anyone with information about the shooter contact police. 
 
 Police have said they are looking for an older model black Chevrolet Impala and a tall African-American man. The city announced a $20,000 reward Sunday and the FBI on Tuesday also offered a $20,000 reward. 
 
 The pastor of the church where Acen was frequently taken, William L. Robinson, struggled Monday to understand the tragedy. 
 
 "It’s heartbreaking, and you don’t really have the words and it was so senseless," Robinson told NBC affiliate KARK. 

 Toddler Dies After Road-Rage Gunfire Hits Car, Little Rock Police Say 
 
 Police in Little Rock are looking for a man they believe shot and killed a 3-year-old boy who was riding in a car driven by his grandmother Saturday night, in an apparent case of road rage. The boy is the second toddler to die in a car-related shooting in the city in the past month. 
 
 "The grandma and 3 year old victim are innocent and have no relationship w/ the suspect," the Little Rock Police Department said in a tweet early Sunday. The department has asked the local community to help find the suspect in the case, who's described as a tall black man driving an older black Chevrolet Impala. 
 
 Police believe the man "opened fire on the grandmother's car because he thought she 'wasn't moving fast enough,' " according to a report on member station KUAR's website. The grandmother had been taking the boy and another child, 1, on a shopping trip. 
 
 Citing a police report on the shooting, the Arkansas Democrat-Gazette says the grandmother's name is Kim King-Macon, and that she told officers the shooting occurred after she had stopped her Dodge Charger at a red light in southwest Little Rock. From the Democrat-Gazette: 
 
 "King-Macon told police a black Chevrolet Impala pulled up behind her while she was stopped at a traffic light and honked its horn, the report said, noting King-Macon then honked back. " 'Ms. King-Macon stated that a black male then exited [the Impala] and fired one shot,' the report said, adding King-Macon then drove to the shopping center and found the boy had been shot when she got him out of the vehicle." 
 
 Discussing the case in the parking lot outside a JC Penny store where officers had converged on King-Macon's car, Little Rock Police Chief Kenton Buckner said, "This is the second time in less than a month that an infant child has been shot while traveling in a vehicle in our city. As you can probably understand, that's very, very frustrating to our police agency, as it should be to our community." 
 
 That earlier shooting, of a 2-year-old girl on Nov. 22, remains an open investigation despite a $20,000 reward for information that results in an arrest and conviction of those responsible. 
 
 Members of the local community say they're planning a news conference at Mercy Church in southwest Little Rock, to support the boy's family and promote the Stop The Violence movement.
– The FBI and the Little Rock Police Department are each offering a $20,000 reward in the hope of finding a driver who killed a little boy because he didn't like his grandmother's driving. The boy, 3-year-old Acen King, was fatally shot near a shopping center Saturday evening in what police say was a random act of road rage, NBC News reports. "Acen has been shot. Oh, my God!" the boy's grandmother, Kim King-Macon said in a 911 call released Monday. "I was at the stop sign and the guy blew a horn at me and I blew it back, and he shot, but I thought it was in the air. He shot at the car." Police say King-Macon didn't realize the boy had been hit until she arrived at the shopping center and found him slumped in his seat, the Arkansas Democrat-Gazette reports. Acen was pronounced dead in Arkansas Children's Hospital. Police say they are looking for a tall black man who was driving an older model black Chevrolet Impala. Horrifyingly, this is the second time in the space of a few weeks that a toddler has been shot dead in a car in Little Rock, NPR reports. In an attack that remains unsolved, a 2-year-old girl who was sitting in her mother's lap was killed Nov. 22 by a shot fired from another vehicle. "This is the second time in less than a month that an infant child has been shot while traveling in a vehicle in our city," Little Rock Police Chief Kenton Buckner told reporters. "As you can probably understand, that's very, very frustrating to our police agency, as it should be to our community."