Two teens are among those arrested in connection with two murders and several shootings in Osceola County.

Kissimmee Police said 15-year-old boy Konrad Schafer shot and killed 17-year-old David Guerrero around 6 a.m. Wednesday, June 26 while walking to a bus stop on his way to work.

Schafer and 20-year-old David Damus are charged with first-degree murder in Guerrero's death.

Police said the teen was looking for random targets and "thought it would be fun to shoot a person."

“We can’t believe there’s kids out there, 15 years old, thinking that something like this could be fun,” said Liz Zapata, Guerrero's aunt.

In a news conference Tuesday, investigators revealed Shafer and Damas were also connected to the July 4 death of Eric Roopnarine. They also said ballistic evidence points to Shafer and Damas as those responsible for shooting into random homes and vehicles throughout the county.

Although Damus was Schafer's driver in Guerrero's death, investigators said he pulled the trigger on Roopnarine after him and three others tried to rob the 22-year-old's house.

Those arrested in Roopnarine's murder include a 17-year-old girl, who allegedly lured him to the front door during the fatal robbery, and 20-year-old Juan Sebastian Muriel.

All four are charged with first-degree murder, home invasion with a firearm and grand theft in Roopnarine's death.

Investigators believe these four had no intention of stopping their reign of terror anytime soon.

“We have reasons to believe that these guys ran out of rounds," said Kissimmee Police Chief Lee Massie. "So the fact that we were able to expedite the case and get these guys off the street before they could re-up was critical.”

Police were able to link Schafer to Guerrero’s death after locating a shell casing in a retention pond.

It turns out, the casing came his father’s firearm that Schafer had taken.

Per News 13's Crime Guidelines, we do not identify juvenile suspects unless they are charged as an adult. Schafer is being charged as an adult in both crimes.