Diane Weaver says she is having a hard time accepting that the man who killed her daughter on Christmas Eve 1987 will soon be free on parole.

Matthew Solomon was sentenced to 18 years to life for the murder of his newlywed wife Lisa. His parole had been denied seven times. But last month, the state Board of Parole, citing what it called Solomon's "rehabilitation efforts," ruled his release would be "compatible with the welfare and safety of the community."

Weaver believes Solomon has never shown remorse and merely manipulated the system to gain his freedom.

"I think he's a very dangerous person," she says. "And I also think that Matthew knew exactly how to act in prison. He is a great manipulator."

Steve Klerk, Lisa's cousin, says more leniency for inmates is a disturbing trend in New York state. He says if people like Herman Bell, who spent decades in prison for killing three police officers, could be released, so could Solomon.

But legal professionals say Solomon's parole is not out of the ordinary. Prominent Long Island defense attorney Tony LaPinta says there are number of things parole boards look at, including input from a victim's family, rehabilitation and remorse and acknowledgement of a crime.

As for Weaver, she has one message for Solomon: "I don't want anything to do with you. You took my baby away from me. That's not something that I can forgive, ever."

The earliest Solomon could be released is May 14.

WATCH - Coverage from the Archives: News 12 Long Island's Doug Geed has covered Lisa Weaver Solomon's murder case for decades -- as worried family members searched, as her body was found, as her husband was charged with murder, and as her family fought to keep him locked up. Revisit some of the key moments in the case from over the years.