INDIAN RIVER COUNTY — Human remains unearthed last week in the backyard of a Fellsmere home are those of missing Sebastian man Brandon Gilley, sheriff's officials said Wednesday.

Detectives are treating the case as a homicide, officials said in a news release.

More:Body found at Fellsmere home; deputies connect residents to missing Sebastian man

Gilley, 23 years old at the time of his disappearance, was reported missing from Sebastian April 11, 2018.

Detectives discovered his body April 3 while serving a search warrant for suspected sale of drugs at a home in the 12000 block of 100th Lane.

His buried remains were found after cadaver dogs alerted handlers to an area in the backyard of the home.

Sheriff's Office spokesman Maj. Eric Flowers said it was not immediately clear how long they had been there, though he noted the body was "fully decomposed."

Autopsy results confirmed the identification earlier this week, officials said.

The dogs were brought in after detectives made a connection between Gilley and the home's residents, Flowers said.

More:Missing 23-year-old's car found in Palm Bay; Mom: 'I may never find out what happened'

Deputies arrested Heriberto Gamez, 31, and Selena Rodriguez, 23, both of Fellsmere, in connection with the warrant.

Gamez was arrested on outstanding warrants for drug possession and felony violation of probation for fleeing and eluding from Brevard County. He was transferred Monday to the Brevard County Jail, where he was being held without bond.

Rodriguez was arrested on misdemeanor charges of possession of marijuana and drug paraphernalia. She was released from the Indian River County Jail last week on $1,000 bond.

So far, no charges have been filed in connection with the body. Flowers said last week additional charges were expected but detectives were working out the details.

Gamez's last listed address was in the 200 block of Willow Street, according to jail records. A report from a prior arrest showed he lived in the home on 100th Lane as recently as June.

Detectives recovered from the home two rifles, a stolen shotgun and stolen handgun, and several quantities of drugs, including 17 grams of crack cocaine, 5 grams of cocaine powder and 12 grams of marijuana.

In a prepared statement, Sheriff Deryl Loar said: "Since his disappearance, our detectives have worked to find out what happened to Brandon.

"Now that we have located the body of Mr. Gilley, our efforts are focused on bringing his killers to justice."

"Detectives are conducting interviews with witnesses and suspects as our efforts are now dedicated to making an arrest," Loar said.

Want more Treasure Coast breaking news coverage? If you're already a subscriber to TCPalm, thank you! If not, please subscribe and help keep coverage of the Treasure Coast's most important breaking news coming.