During forensic analysis, there might be cases where you need to install a few applications on the device in order to extract some data. To do so, you can use the adb install command. Along with this command, as shown in the following command-line output, you need to specify the path to the .apk file that you want to install:

adb install C:	est.apk
Success

However, it is important to note that installing third-party apps may not accepted in a court of law. Hence, a forensic investigator needs to be cautious before installing any third-party app on the device.