JUSTIN O'Gilvie, the business partner of Christopher 'Dudus' Coke, is now behind bars.
He was taken into police custody on Saturday.
O'Gilvie, who is otherwise called 'Stinga', is one of 26 persons who have so far been taken into custody under powers granted to the police under the current limited State of Emergency.
"There are about 25 persons arrested so far because they are a threat to public safety," Commissioner of Police Owen Ellington told reporters and editors at the Observer's weekly Monday Exchange held at his office on Old Hope Road yesterday.
As tensions grew and violence rocked the city, Prime Minister Bruce Golding announced that a limited State of Public Emergency would be imposed on Kingston and St Andrew.
Under the law, the police have special powers to detain citizens for more than 72 hours during a State of Emergency.
O'Gilvie is a director of the Presidential Click and Incomparable Enterprises businesses and is one of three alleged Shower Posse members the police have targeted.
The others are Harry McLeod, also called 'Harry Dog'; Prince Bucket, also called 'Tugman'; and Paul KirkPatrick, otherwise called 'Teddy Paul'.
Coke is wanted by the United States Government on gun and drug-running charges.
He has so far managed to elude several attempts by the security forces to nab him.