The arrest of the alleged J6 pipe bomber just piles mystery on top of mystery.

What we know from court documents and media reports since his arrest Thursday is that suspect Brian Cole Jr., is a black, 30-year-old loner who lives in his mom’s basement in the middle-class suburb of Woodbridge, Va., a 20-minute drive from Washington, DC. According to his family, he is borderline autistic, and incapable of such a crime.

In interviews, Cole’s grandmother, Loretta Cole, has said he is “very naïve … He’s almost autistic-like because he doesn’t understand a lot of stuff.

“He’s slow. He may be 30, but he’s got the mind of a 16-year-old.”

Yet we are told this alleged criminal mastermind evaded the FBI for almost five years.

Surely there’s more to it than that. Director Kash Patel hinted Friday at a reason the FBI under Biden administration Director Christopher Wray may not have wanted to solve the case: “intentional negligence.”

This, after all, was the FBI that managed to round up and charge 1,500 supporters of President Trump who set foot anywhere vaguely near the Capitol on Jan. 6, 2021, tracking them down through cellphone pings and video footage.

Yet with all its technical ability, Wray’s FBI somehow missed the phone used by the suspect in the vicinity of the Democratic National Committee and Republican National Committee headquarters on the evening........

© New York Post