Suspended NASCAR driver Kurt Busch will not face charges over alleged domestic abuse accusations involving his ex-girlfriend, the Delaware attorney general’s office said on Thursday.

The attorney general said there was a lack of evidence in the case at Dover International Speedway last September involving Busch and Patricia Driscoll in his campervan.

Busch was suspended last month by the popular stock car racing series after a Delaware family court judge granted Driscoll a protective order, saying Busch more likely than not committed an act of domestic violence against her.

The criminal case, conducted by Delaware police and officials at the speedway, was separate from the family court probe.