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Jimmie Johnson

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In the wake of his family’s tragedy, NASCAR driverJimmie Johnsonwon’t be racing this weekend, his team announced on Tuesday.“LEGACY MOTOR CLUB has elected to withdraw the No. 84 Carvana Chevrolet from this weekend’s NASCAR Cup Series event in Chicago,” the stock car racing teamsaid in a statement. “The Johnson family has asked for privacy at this time and no further statements will be made.”

Police believe Johnson’s mother-in-law Terry Janway shot and killed her husband Jack Janway and their grandson Dalton late Monday night at the family’s home in Muskogee, Okla., police confirm to PEOPLE.

Terry, 68, was found dead inside the residence along with her husband Jack, 69, and their 11-year-old grandson Dalton, police told PEOPLE.

Terry and Jack are the parents of Johnson’s wife of 19 years, Chandra.

Their deaths are being investigated as a murder-suicide and police believe Terry to be the primary suspect.

“Additional information will be released if it becomes available,” the department said.

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Jimmie Johnson

According to Fox 23 News, Jack was a chiropractor whose patients included the city’s mayor, Marlon Coleman.

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“It was traumatizing to find out that a long-standing family who had made so many contributions to our community were involved in this type of incident. It was even more bone-chilling to find out there was a child involved,” Coleman told the station. “I knew Dr. Janway. Dr. Janway has worked on me, we’ve been acquaintances for a very, very long time since I’ve been in Muskogee. Just knowing that it was him and his family took a different toll on me.”

This week, NASCAR is making its first foray into street-course racing,ESPN reports.

Johnson, racing part time this year, was set to make his fourth start of the season,according to Motorsport.com.

This year, he has appeared in the Daytona 500, COTA and the Coke 600, the outlet reports, and was also part of the Garage 56 NASCAR entry at the 24 Hours of Le Mans in early June.

On Tuesday afternoon,NASCAR also released a statementregarding the news.

source: people.com