This page lists the solutions to all investigations in chronological order. The gang investigations that are not tied to a specific date are added directly after the initial gang investigation. However, you cannot begin the next case in the gang investigations, until the day after catching the previous gang member. Please be aware that this page contains major spoilers.
Day 4: Homicide
Day 5: Robbery (The Red Masks)
Receiving Stolen Property
Sale of Stolen Goods
Day 9: Arson
Day 13: Hit and Run
Day 15
There are five different investigations that can be triggered on day 15, depending on the game language.
Wheels of Empire (None of the below languages)
Destruction of Property
Armed Robbery
Receiving Stolen Property
Uterus Magna (French)
Vandalism
Abduction / Police Impersonation
Homicide
Traveling Circus (Portuguese)
Carjacking
Robbery / Homicide
Homicide
Guardian Angels (Spanish)
Rape
Extortion / Destruction of Property
Assault with an Offensive Weapon / Extortion
Flesh and Bone (Chinese)
Harrasment
Pandering
Human Trafficking
Day 16: Theft
Day 18: Theft
Day 21: Robbery
Day 25: Homicide
Day 29
Depending on who won the Mafia War, you will get the chance to begin investigating one of the mafias. Successfully completing all cases and eliminating the mafia will disable their assignments, abilities, and risk to the player.