tyrese & ex-wife (norma gibson)*The war between Tyrese Gibson and his ex-wife continues.

In the latest skirmish, the actor/singer says she’s using his friend Paul Walker‘s death to shame him in their child custody battle.

TMZ is reporting that Norma Gibson filed court docs claiming Tyrese is a bad dad, who should have stayed in L.A. to spend time with their 6-year-old daughter after Paul Walker’s death … because he had time on his hands since “Fast & Furious 7″ was put on hold.

Norma says Tyrese ignored his daughter, choosing instead to go “gallivanting throughout Dubai … staying in expensive hotels … partying on yachts, sky-diving with other movie stars, driving expensive cars, and making special appearances in night clubs.”

But sources close to Tyrese say he’s indignant Norma is using Paul … and he went to Dubai on business. He had 4 gigs and he needed the money — ironically to pay the child support Norma was demanding.

Later this month, look for things to come to a head when they both meet with a court-appointed evaluator to see who’s the best option for their daughter

The court battle rages on later this month … when they each try and convince a court-appointed child evaluator who’s good and who’s evil.