A convicted murderer who fatally stabbed two men on the same Brooklyn block just months apart in 1985 has been approved for release by the state parole board — infuriating one of his victims’ families, The Post has learned.

“If he can take two lives, he can take more,” said the weeping daughter of father of 12 Angel Lugo, who was knifed to death during a robbery by Juan Franco.

The woman, who only wanted to be identified as Sandra, and her nine remaining siblings will appear before the parole board Friday and beg members to change their minds about releasing Franco next month.

Franco, 50, has spent the last 26 years in prison for murdering Lugo, a family man he met at a bar in DUMBO.

The two played pool, and Lugo even bought him a beer because it was payday.

As the unsuspecting dad later walked to the subway station at York and Jay Streets, Franco jumped him and stabbed him repeatedly before swiping his valuables.

Franco went home — but then returned to Lugo’s body after realizing he hadn’t gotten all of his cash.

Two months earlier, Franco fatally stabbed stranger Phillip Lopapa in his car during an argument over how much Lopapa would pay Franco for a consensual sex act.

Franco was also arrested in 1984 for a non-fatal stabbing and even stabbed an inmate while incarcerated at the Clinton Correctional Facility in upstate Dannemora.

“Stabbing comes very easily to this guy,” said another of Lugo’s children, Luis, to the Post. “Too easily.”

“He’s an animal,” Sandra seethed.

Franco is scheduled to walk free from the Fishkill Correctional Facility on May 12. He has been denied parole on three previous occasions since becoming eligible in 2011.

“The hard work the detectives and assistant district attorneys put into his case should not go to waste,” Luis said. “Their effort is going to go down the drain because this parole board has no idea who this guy is. He is not someone who should be free.”

“Is he going to look for us?” Sandra worried. “We don’t know. Does he know who we are…it’s terrifying. Not just for us, for society.”

A law enforcement source called Franco a “psychopath.”

“Society cannot be said to be safe from him unless his incarceration is continued until his death,” the source said.

“He tore my family apart. He took a husband, a father, and a grandfather– he shouldn’t be able to walk out,” Sandra sobbed. “Prison life is all he knows.”

‘This guy does not belong out,” Luis added angrily. “If he is released, the blood of his next victim will be on their hands.”