https://www.vice.com/en_us/article/gyzawx/authorities-arrest-suspected-jack-dorsey-hacker

Authorities have arrested a man who is allegedly part of The Chuckling Squad, a hacker group that in August compromised the Twitter account of Twitter CEO Jack Dorsey, according to law enforcement and criminal sources. The group also claimed responsibility for hacks of other celebrities, including actress Chloë Grace Moretz.

Owen Grech, the alleged member, was arrested around two weeks ago, one of the leaders of The Chuckling Squad, who goes by the handle Debug, told Motherboard.