They include Mukono municipality MP Betty Nambooze, on the basis of a video in which she explains how easy it is to attack Abiriga even with his bodyguards all around him. A source privy to the ongoing investigations told URN that Nambooze was being investigated for inciting violence.
He listed MPs Evelyn Anite, Ruth Nankabirwa, Simeo Nsubuga and Raphael Magyezi as the next possible targets. Mugerwa also threatened President Yoweri Museveni and his son Muhoozi Kainerugaba.
"All of you who touched on the constitution, you will pay. Even you Museveni and your son Muhoozi we are following you step by step," Mugerwa says in the audio which is making rounds on social media.
The third file is against one Jane Kuli, whose facebook post on May 24, 2018, 'foretold' that Abiriga would die in the first week of June. (Editors note: It's highly likely that the post was conveniently edited after Abiriga's murder last week).
With the exception of Nambooze, the three others are looked at as persons of interest in the murder of Abiriga and his brother Saidi Buga Congo. The two were gunned down on Friday evening in Kawanda, Wakiso District.
"Someone like Mugerwa, he has gone on record and confessed to being behind the assassination. We have to bring him in and find out what he knows. The rest will be subject to investigations," the officer who preferred anonymity said.