Christopher Preciado (left) and his father Ramon Preciado (right) were arrested on Wednesday night in connection with the killings of Savannah Soto and Matthew Guerra (Pictures: San Antonio Police Department)

A teenage boy and his dad have been arrested in connection with the killings of a pregnant teen and her boyfriend whose bodies were found in a car after they failed to show for her labor induction.

Christopher Preciado, 19, and his father Ramon Preciado, 53, were taken into custody on Wednesday night, the San Antonio Police Department wrote on Facebook.

Their arrests came just over a week after Savannah Soto, 18, and her boyfriend Matthew Guerra, 22, were discovered shot dead in his Kia Optima outside his apartment in the Northwest Side. Their unborn baby also died.

‘Our deepest condolences go out to the Soto and Guerra families,’ wrote the police department.

Christopher Preciado (middle) is escorted by San Antonio police on Wednesday (Picture: AP)

Ramon Preciado (middle) is escorted by San Antonio police on the same day as his son (Credits: AP)

Christopher has been charged with capital murder, while Ramon has been charged with abuse of a corpse ‘for helping Christopher move the bodies after they were murdered’, the department stated.

The slayings are believed ‘to be a narcotic-related deal that went bad’, said San Antonio police Sgt Washington Moscoso.

‘We do expect more charges to be pending,’ said Moscoso, adding that the Bexar County District Attorney’s Office is determining whether there will be ‘any charges related to the unborn baby’.

Christopher is being held on a $1million bond, per county court records, and did not immediately have a court date set. His father had a $100,000 bond set and a hearing slated for February 6.

Savanah Soto (left) and her boyfriend Matthew Guerra (right) did not appear for her appointment for her labor to be induced (Picture: Facebook/Rivera Kass)

Savannah Soto missed her induction appointment on Christmas Eve (Picture: Facebook)

Savannah was scheduled to go to a hospital on Christmas Eve for her labor to be induced and was reported missing by her family after not turning up for the appointment.

The young couple were found dead on December 26 after being left there for ‘possibly three or four days’, police Chief William McManus said last week. He called the case ‘very perplexing’.

Last Thursday, police released surveillance footage of two persons of interest in the crime. It showed a person of interest getting out of a pickup truck and going to the driver’s side of Guerra’s Kia, and the second person of interest leaving the driver’s seat of the car.

Police last week released surveillance footage (right) of two persons of interest in the killings of Matthew Guerra and Savannah Soto (left) (Pictures: TikTok/San Antonio Police Department)

Moscoso on Wednesday said investigators collected ‘key pieces of evidence’ from Savannah’s phone and sent it to the technology team to download.

‘We were able to get enough information,’ he said, and cops located the Preciados’ home.

‘The father answered the door,’ Moscoso said. ‘He knew why the police were there (and) cooperated fully with the investigation.’

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A teen boy and his dad were arrested in connection with the killings of pregnant Savannah Soto and her boyfriend Matthew Guerra.