A $50,000 reward is now being offered by the FBI for information leading to an arrest in the 2018 killing of two people inside the Bushwick Houses in Brooklyn.

The $50,000 reward is in addition to the $20,000 reward already offered by the NYPD.

The FBI and the NYPD are still trying to find answers as to what led to the killings. On May 11, 2018, Ana Del Valle was found dead inside her fifth-floor apartment at 140 Moore St. Two days later, her next-door neighbor, Basil Gray, was found dead inside his apartment.

Police tell News 12 that they believe both of them were killed on the same day.

"We had no eyewitnesses, no 911 calls and limited forensic evidence at the scene," says Det. Stephen Minucci.

Detectives have investigated numerous leads over the years.

"As we conducted our investigation, what we began to discover was that there may have been a nexus to drug trade in 140 Moore and the surrounding housing projects," says Minucci. "While it was not connected to the victims themselves, we believe that it was somehow the impotence for what happened. Somehow they were caught up in it, in the violence that is connected with any kind of drug trade."

FBI special agent in charge Michael Brodack says no tip is too small.

"What is insignificant to them is very significant to us and could be that little piece of the puzzle that could put it all together for us," says Brodack.

Del Valle's daughter hopes the increase in reward money will help find the killer.

Minucci says there are multiple persons of interest in the case, but people need to come in and talk.

Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS or the FBI at 212-384-1000.