MERRICK, N.Y. (CBSNewYork) — Neighbors and relatives say 32-year-old Evan Grabelsky was murdered while home alone in the Elliot Street house in Merrick he shares with his parents.

Investigators said family members returned to the home late Saturday after a dinner out and discovered Grabelsky’s body covered in stab wounds, CBS2’s Dave Carlin reported Sunday.

READ MORE: NYPD: Craig Tamanaha Charged With Arson For Setting Christmas Tree On Fire Outside FOX News Building

“There were multiple areas of this residence where the struggle did ensue and that this individual had defensive wounds to his hands and his arms,” Nassau County Police Det. Lt. Richard Lebrun said.

Web Extra: Nassau County PD On Merrick Homicide Investigation 

Grabelsky’s parents spent part of Sunday afternoon outside the home being comforted by neighbors and family, including the victim’s two brothers, who CBS2 has learned were told to live elsewhere.

Grabelsky was a director at a Long Island day camp for kids. According to his LinkedIn account, he also worked with special education students at Great Neck North High School.

“They’re a lovely, lovely family,” one neighbor said. “This is just a huge, huge shock.”

“We’re horrified. We’re horrified,” another neighbor said.

READ MORE: Funeral Today For Probationary Firefighter Vincent Malveaux

Investigators said they believe the victim knew his attacker.

“This homicide does not appear to be random by any means,” LeBrun said. “These two individuals did know each other or had some type of relationship.”

Police said they did not find signs of forced entry into the home. They did not offer up what they believe to be the connection between Grabelsky and his killer, who remains on the loose.

As of Sunday evening, there was no suspect description or motive.

Neighbors said the lack of knowing made them nervous at the start, and nervous still.

“My neighbor texted me, ‘Something happened, make sure you lock all your doors and put your alarm on,’ and so that’s what we did,” neighbor Brian DiGiovanna said.

MORE NEWS: New Sharks Exhibit Coming To American Museum Of Natural History

Police searched homes on the dead end section of Elliot Street for possible surveillance video. They are not ruling out the possibility there is more than one killer.