HBO documentary series “The Jinx,” which chronicled the twisty tales of Robert Durst, ended its run Sunday with a ratings spike.

Nielsen estimates that the sixth and final installment of “The Jinx: The Life and Deaths of Robert Durst” averaged 802,000 viewers for its initial airing at 8 p.m., a roughly 80% jump from the prior week’s 446,000 and the program’s largest audience to date. The previous high for the show was the 752,000 who tuned in for its premiere on Feb. 8.

“The Jinx” was HBO’s second most-watched program on Sunday, behind only the 845,000 who watched “Last Week Tonight” at 11 o’clock. A second airing of “Jinx” at 11:30 p.m. on Sunday drew 250,000 viewers to bring the program’s total for the night to about 1.05 million.

Sunday’s installment, which featured an apparent confession by Durst as he muttered to himself that he “killed them all, of course,” into a live microphone off-camera, came one day after the son of one of New York’s most prominent real estate dynasties was arrested in New Orleans in connection with the 2000 death of his friend Susan Berman.

“The Jinx” was one of Sunday’s most popular subjects on Twitter, according to Nielsen Twitter TV Ratings. The finale of the HBO documentary garnered 35,000 tweets on Sunday night, which were seen 11.1 million times by 2.8 million people. The only two programs to attract more Twitter attention were AMC’s “The Walking Dead” and ESPN’s documentary premiere “I Hate Christian Laettner.”