An “utterly incompetent” lawyer who used Wikipedia to bone up on the ins and outs of the Texas legal system may land her client in the electric chair, his new attorneys claim.

Convicted killer TaiChin Preyor’s lawyers are now trying to stop his July 27 execution by saying “shocking conduct” by his previous attorney, Brandy Estelle warrants a new trial, the Houston Chronicle reported.

“It appears she relied on Wikipedia, of all things, to learn the complex in and outs of Texas capital punishment,” Preyor’s new attorneys wrote in a pair of motions filed Friday.

The attorneys pointed to Estelle’s case files which included a printed out “capital punishment in Texas” Wikipedia page with a sticky note on it labeled, “research.”

They also said she’d received legal counsel from an attorney who was disbarred for showing “gargantuan indifference to the interests of his clients,” a federal court wrote in a published decision.

Preyor’s new legal team, which includes attorney Catherine Stetson, a pro-bono attorney and a partner at the firm Hogan Lovells, said Estelle’s so-called-research warrants the court’s intervention.

Their dozens of pages of motions requested a stay of execution and for the court to reopen the inmate’s federal appeal this time with, “licensed and qualified counsel.”

Preyor, 46, was convicted in 2004 of repeatedly stabbing and fatally cutting the throat of a woman who had allegedly been selling him drugs.

Neighbors found Jamie Tackett after hearing her screams, and police caught Preyor after he came back to get his car keys.

He has been on death row since 2005.