The Fitzgibbon family "convicted themselves by their own words, in their own house", police said after officers hid a listening device in the family's detached home in an affluent Merseyside suburb.
In covert recordings the brothers can be heard bickering over who is the better drug dealer and in another Jason can be heard singing a version of Jessie J's song Price Tag. He can be heard singing: "It's all about the money, money, money."
More top news
Can you guess what film the cow was trying to watch?
New 'smart ticketing' plans will also be introduced so travellers can receive automatic compensation payments for late trains.
The 41-year-old father of six died last Thursday - a week before he and the band had been due to begin touring in North America.