Cop tells how supremacist gave up in slay

The hate-filled sicko who said he fatally stabbed a stranger in Times Square as “practice” for what he intended to be a massacre of black men had a casual attitude as he surrendered to police, an officer testified Tuesday.

James Harris Jackson, 30, as he was being searched at the NYPD’s Midtown South Precinct substation on W. 43rd St. offered that the murder weapon was “in a garbage can in Lafayette Park” when quizzed by Police Officer Daniel Noonan, less than two days after Jackson repeatedly plunged an 18-inch blade into 66-year-old Timothy Caughman.

Noonan had just uncovered another knife — a black Smith & Wesson dagger — in Jackson’s coat pocket.

“And directly after that, [Jackson] said in a joking manner, ‘I should probably stop talking now, right?’ ” Noonan recalled at a pretrial hearing in Manhattan Supreme Court on direct examination by prosecutor Dafna Yoran.

Cops found yet another pocket knife in his coat and the murder weapon — a small sword — was actually recovered in Washington Square Park.

The nonchalant white supremacist from Baltimore, who had served in the Army, later gave a full confession to investigators detailing his twisted murder motive.

"Mr. Jackson regarded the killing as practice prior to going to Times Square to kill additional black men," according to court papers previously filed by prosecutors.

Instead of carrying out further attacks, Jackson gave himself up as police were hunting him down.

Video played at the hearing of Jackson’s voluntary surrender at the station, in the heart of Times Square, depicts him calmly walking to the entrance of the widely-recognized structure that was swarming with cops during a tour change shortly after midnight.

He took off his coat and hung it on a post. Before even getting inside, Jackson turned around to be handcuffed by an officer posted at the door.