The imprisoned brother of the woman arrested in the homicide of three members of a Griswold family is also a suspect in the slayings, multiple law enforcement sources said.

Sergio Correa, 26, is currently being held in a Hartford jail on $350,000 bail for drug charges from an arrest in February, about two months after the December slayings of Kenneth and Janet Lindquist in their home.

The couple's son, Matthew Lindquist, was found dead in the woods a short distance from their home five months later with multiple stab wounds.

Ruth Correa, 23, of Hartford was arrested last week and charged with three counts of felony murder and a single count of murder of two or more persons at the same time, as well as home invasion, first-degree arson and first-degree robbery.

She is the adopted sister of Sergio Correa. Their father, Pablo Correa, is a state Department of Correction officer.

Sergio Correa’s attorney, William Gerace, said Tuesday his client hasn’t been charged in the murder case.

“The state police have said they expect more arrests,” Gerace said. “I’m prepared to defend him if he is arrested in this case.”

Ruth Correa is being held on $2.5 million bail. The arrest warrant in her case is sealed and a motive for the murders wasn’t discussed during her brief court appearance Monday. She has no prior criminal record.

State police originally considered Matthew Lindquist a “person of interest” after his parents’ bodies were found in the burned-out shell of their home on Kenwood Estates in Griswold. Police released his photo about a week after the murders and asked for the public’s help in locating him.

Law enforcement sources said police are investigating the possibility that Matthew Lindquist allegedly hired the suspects to kill his parents for an unclear reason.

Matthew Lindquist was stabbed more than 40 times.

Janet Lindquist died of "homicidal violence including blunt impact injuries to the head" and smoke inhalation, which means she was alive when her house was set on fire. Kenneth Lundquist died of "homicidal violence including multiple skull fractures and traumatic brain injuries." There was no smoke found in his lungs, indicating he was dead before the fire started, sources said.

Sergio Correa was arrested on three violation of probation charges by Hartford police in February. When Hartford police found him to serve those warrants, he was found to be possession of drugs and additional charges were filed. Those cases are pending against him in Superior Court in Waterbury.

Sergio Correa’s bail was set at $100,000 for each case and $50,000 for the drug possession charge at the time of his most recent arrest.

His criminal history includes convictions for robbery and arson, according to court records.

He was arrested twice in 2008 on charges, including first-degree attempted robbery with a deadly weapon, first-degree assault, first-degree larceny, second-degree arson and criminal use of a weapon, records show.

He was sentenced in 2011 to 20 years, suspended after serving 10 years along with three years probation. It was unclear Tuesday when he was released from prison.

The Lindquists were found dead by firefighters after they battled a fire at the house for hours. The home was completely destroyed, and the remaining charred pieces of the home were removed earlier this month.

Not long after firefighters were called to Kenwood Estates on Dec. 20, authorities in Glastonbury learned of a car fire in an apartment complex parking lot. The car was registered to the Lindquists, but it had been abandoned.