The father of Konrad Schafer, the Osceola County teenager accused of shooting and killing two people in 2013, has been sentenced to four months behind bars as part of a plea deal on charges related to buying the alleged murder weapon for his son.

Lothar Schafer, 58, pleaded no contest Thursday to illegal possession of a firearm. As part of the plea agreement, he must also serve two years of probation following his jail sentence. He would have faced five years in prison if the case had gone to trial.

Konrad Schafer was 15 years old when investigators said he killed Eric Roopnarine, 22, during an alleged robbery in Poinciana in July 2013. Investigators said the teen also killed 17-year-old David Guerrero at a bus stop in a separate incident, and was also suspected in several drive-by shootings around Kissimmee that did not injure anyone.

Now 17 and charged as an adult, Konrad Schafer's trial for murder is set to begin in mid-March.

Lothar Schafer was arrested in Polk County in August 2013 for negligence and allowing unlawful possession of a firearm. Investigators said he bought the gun his son allegedly used in a shooting spree around Kissimmee that ended in two deaths.

The teen's father claimed he bought the gun for himself, and Konrad stole it.

"No, not for my son, for my protection," Lothar Schafer said following his arrest.

In court Thursday, Lothar Schafer's attorney said his client was confused and upset as he entered his no-contest plea and walked away in handcuffs.

Lothar Schafer, who is deaf, chose not to make a statement to the victims' families, but his attorney, Don Waggoner, said he was very upset over what his son did.

"He doesn't know how his son got the gun," Waggoner said. "He doesn't know how this happened. But it did happen, so if there is any blame to be put on him, he says he is sorry."

Konrad Schafer reportedly told police he "thought it would be fun" to shoot someone, but his father claimed the teen's confession was not true and was made out of fear.

"Konrad has a confused mind, but he's not telling the truth. He was scared," Lothar Schafer said in 2013. "I couldn't blame him, but it's not true."

Three other young suspects were charged in the murders — Victoria Rios, Juan Muriel and David Damus — who were all between 17 and 22 when they were charged two years ago.

Muriel took a plea deal in January 2014, agreeing to testify against his three co-defendants for a lesser sentence of 10 years in prison and five years of probation.