There are various ways to get Energy in criminal case game. You will either get Energy directly added to your Energy bar, or get Energy items that you can use when you want.
How to get EnergyHere is a list of all the ways you can get Energy:Automatic refill:
You can wait until your Energy bar is partially or completely refilled

Level up refill:
When you level up, your Energy bar will automatically be filled up to 110. It will not exceed 110 if you had Energy points remaining. If you had more than 110 Energy points you will not lose any.(Check a trick to level up fast)

Daily bonus:
If you claim your daily bonus reward during at least 3 consecutive days, you will get Energy items. You will obtain 1 Potato Chips if you claim your reward for 5 consecutive days or more!
 
Purchase Energy Items:
You can also purchase Energy Items with Cash to get Energy right away.
To purchase Energy Items, please follow these steps: Click on the Energy bar or on the Energy icon in the circular menu at the bottom, left-hand corner
Click on the Energy bar or on the Energy icon in the circular menu at the bottom, left-hand cornerChoose among the following Items:Orange Juice which costs 10 Cash and gives you 20 EnergyPotato Chips which cost 25 Cash and give you 50 EnergyBurger which costs 50 Cash and gives you 120 Energy

Rewards collection Free Gifts:
You can benefit from the Free Gifts offered every day on the Facebook Rewards collection. Rememb...