Police brutality is covered under what amendment?

I am a Military Police Officer and I am just curious as to what amendment this subject is covered under.

14th Amendment:
“Nor shall any State deprive any person of life, liberty or property without the due process of law; nor deny any person within it’s jurisdiction the equal protection of the laws.”
Many states have a policy about the use of force Incorporated into the statutes. This is called the “USE OF FORCE CONTIUUM” The force esculates as the victim keeps agression going and non compliance.
1. Physical Presence
2. Soft Handed Tactics
3. Mace / Pepper Sprays
4. Hard Hand Tactics
5. Baton / Taser
6. Threat of Deadly Force
7. Deadly Force
These steps in progression to resistance esculate to possible death. It is when the suspect gives up and force at the next higher level is used when unwarranted, that brutality or excessive force can be brought as a charge.
The best way to address this is by a lawsuit of a Civil Rights Violation, under 42 U.S.C. 1983 and the 14th Amendment.