(CNN) — Four kidnapped California family members — including a baby girl — were found dead in a farm area Wednesday, authorities said, two days after they were abducted from their business in a case where investigators have detained a suspect but not announced a motive.

The bodies of 8-month-old Aroohi Dheri, her parents Jasleen Kaur and Jasdeep Singh, and her uncle Amandeep Singh were recovered by authorities Wednesday evening after a farmworker alerted them to remains in an orchard in central California’s Merced County, authorities said.

The discovery, coming a day after a suspect in the case was detained, was announced by a visibly emotional sheriff who said the killings were “completely and totally senseless.”

“There’s a special place in hell for this guy,” Merced County Sheriff Vern Warnke said Wednesday night, referring to the suspect. CNN is not naming the suspect because no charges had been filed against him as of late Wednesday.

“A whole family (was) wiped out, and we still don’t know why,” Warnke said.

The family was kidnapped at gunpoint — an abduction recorded on surveillance video — from their trucking business Monday morning in Merced, a city between Modesto and Fresno in central California, authorities said. Investigators learned they were missing after a family vehicle was found abandoned and on fire that morning, authorities said.

Police took a 48-year-old suspect into custody Tuesday after his family told law enforcement he admitted to being involved in the kidnapping, Merced County sheriff’s Deputy Alexandra Britton said.

“The circumstances around this, when we are able to release everything, should anger the hell out of you,” Warnke said.

The suspect attempted suicide sometime before he was taken into custody, and he has been receiving medical attention, Warnke said.

Warnke did not say how the family was slain. He said it appears they were killed where they were found, and killed before the sheriff’s department was notified Monday that the family was missing.

The person in custody is the main suspect in the killings, though investigators believe others may have been involved, according to Warnke, who did not elaborate on the extent of that involvement.

“I fully believe that we will uncover and find out that there was more than just him involved,” Warnke said.

The suspect has been providing information to investigators, and officials are working with him to identify a motive, Warnke said.

Kidnapping of ‘peace loving’ family caught on video

Earlier Wednesday, authorities released surveillance footage of the kidnapping at the family’s Merced trucking business Monday morning.

The video shows Jasdeep Singh arriving at the business’ parking lot at 8:30 a.m., followed by Amandeep Singh arriving nine minutes later.

Shortly before 9 a.m., Jasdeep is seen encountering a man outside the business. The man carried a trash bag and pulled out what appeared to be a firearm, the video shows.

Several minutes later, Jasdeep and Amandeep are seen with their hands tied behind their backs as they get into a truck. Shortly after, the truck leaves and returns six minutes later.

Upon returning, the suspect enters the business and exits with a gun in hand as Jasleen Kaur holds 8-month-old Aroohi and walks in front of the suspect to the truck.

Later Monday, a farmer found two of the victims’ cell phones on a road, authorities said. At one point, the farmer answered the phone and spoke with a relative of the victims.

Before the bodies were found Wednesday evening, a family member had urged people to come forward with any information in the case.

“This is a peace-loving family and running a small business in the Merced area,” pleaded Balvinder, a family member. “This is something that nobody is prepared for dealing with … we are just hoping and praying every moment.”

A victim’s ATM card was used

On Tuesday morning, investigators learned that an ATM card belonging to one of the victims was used at a bank in Atwater, California, which is about 9 miles northwest of Merced, the sheriff’s office said.

It is unclear whether the man in custody is the person who used that card, Britton said.

The suspect in custody was convicted in 2005 in a case involving armed robbery and false imprisonment and was paroled in 2015, Warnke said.

In that previous case, the man acted alone and knew the victims, according to Warnke.

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