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- Elon Musk brought Grimes' social media posts into their custody battle.
- Musk used Grimes' posts about living in Texas to argue the state has jurisdiction over the case.
- Musk could avoid hefty child support payments if he keeps the case in Texas.
Elon Musk has dragged Grimes' social media posts into his ongoing custody battle with the singer, according to court records obtained by Business Insider.