The Brooklyn ex-con on trial for barricading himself and his pregnant girlfriend inside their apartment before shooting three NYPD cops texted a buddy before the shooting, “Yo homie I ain’t going back behind that wall man. F— this,” prosecutors said Tuesday.

Nakwon Foxworth, 33, should be convicted of attempted murder in his Brooklyn Supreme Court trial in part because his texts show he planned his attack on the cops who were outside his Sheepshead Bay apartment on Easter Sunday 2012, prosecutors said.

“His own words prove his guilt beyond a reasonable doubt,” Brooklyn assistant district attorney Andres Palacio said in his opening statement.

As cops massed outside the apartment in response to a 911 call, Foxworth texted a pal the message, “They’re at my door. They’re scheming on me,” Palacio said.

Foxworth then texted the “Not going back” message just before he blasted at the Emergency Service Unit cops through the open door just as his girlfriend and their then-4-month-old son escaped, Palacio said.

Foxworth was released from jail in 2009 after doing 10 years for weapons and drugs. He also did two years behind bar for attempted murder as a juvenile.

He shot three cops and grazed several others with a semi-automatic handgun before he was stopped, but had other guns close at hand.

“He had armed himself by pulling out three guns and loading them with ammunition and preparing for his own personal showdown with the police,” said Palacio during his opening statement.

“He was a desperate man. Jail was not an option.”

Defense attorney Damien Brown said Foxworth only fired after the ESU cops charged into the apartment with their guns blazing.

“They shot first. They had no reason to go in at that time because there was no one else in the apartment besides him,” Brown said.

Detective Kenneth Ayala was credited with saving his colleagues’ lives by holding on to a bulletproof shield despite taking two shots to his leg, while Detective Michael Keenan and Detective Matthew Granahan were also hit.