Jimmie Johnson’s sister-in-law in disbelief after losing her parents in ‘murder-suicide’

Jimmie Johnson’s sister-in-law Marianne Janway’s reaction to an apparent murder-suicide within the family was seen on Facebook Monday night.

Jack and Terry Lynn Janway, parents of Johnson’s wife Chandra Janway, were found dead shortly after 9pm Monday night.

Their grandson, Dalton Janway, 11, was also found dead, with all three suffering from gunshot wounds at their home in Oklahoma.

Terry is considered a suspect in the killings. 

And Marianne reacted online to the news, writing on Facebook ,’Please tell me this isn’t really happening please god someone.’

Jack and Terry Janway, parents of Johnson’s wife Chandra Janway (pictured with Jimmie) were found dead shortly after 9pm last night,

It is unclear who made the call but officers are treating Terry, 68, (pictured)  as the suspect in the shooting

Johnson’s driving teammate Jenson Button also paid tribute to his family online.

‘Sending love and prayers to my team mate Jimmie, Chandra and the whole Johnson family at this devastating time,’ he wrote on Twitter.

When officers arrived at the scene they found Jack dead in the hallway inside of the home, and Terry and Dalton in the residence.

Moments before making that grim discovery, they’d heard a single gunshot ring out.

It is not clear whether Marrianne is Dalton’s mother.

Muskogee Police Officer Lynn Hamlin confirmed that there was no threat to the community after the triple shooting.

Jenson Button (front) and Jimmie Johnson of the #24 NASCAR Next Gen Chevrolet ZL1 look on ahead of the 100th anniversary of the 24 Hours of Le Mans at the Circuit de la Sarthe

Johnson’s driving teammate Jenson Button sent his well wishes to the family on social media 

Jimmie Johnson will not race this weekend after his mother-in-law shot her husband and grandson dead

Muskogee Police say that a woman called 911 to say there was a ‘woman with a gun’ before hanging up

She said: ‘It’s looking very likely that it’s a murder-suicide. At approximately 9:05pm, dispatch received a 911 call from a female caller who stated that there was a disturbance and someone had a gun and then hung up.

Legacy Motor Club also confirmed the seven-time NASCAR Cup champion will not race this weekend.

‘Legacy Motor Club has elected to withdraw the No. 84 Carvana Chevrolet from this weekend’s NASCAR Cup Series event in Chicago,’ a statement read.

 ‘The Johnson family has asked for privacy at this time and no further statements will be made.’