Download the game from your app store, install it, then open the app and follow the tutorial prompts to learn basic gameplay steps.

Investigate crime scenes, examine clues and evidence, interrogate suspects, and analyze samples to identify the killer.

Tap on highlighted areas and objects during investigations; use hint tools if needed through the gameplay interface.

Proceed to interrogation scenes via storyline prompts and choose appropriate questions to gather information.

Access the evidence lab or analysis section from the main menu to examine samples in detail.

Yes, you can purchase additional hints or boosters via the store menu; check Settings > Store for options.

Go to your device's Settings > Accounts > Subscriptions, find Criminal Case, and cancel or modify your subscription.

The game is free to play, but optional in-app purchases can help speed up progress or unlock special features.

Try restarting your device or reinstalling the game; ensure your app is updated to the latest version.

Some features require an internet connection, but you can play parts of the game offline after initial download.