Answer:
8th amendment
Step-by-step explanation:
You want to know which amendment may have been violated by Kevin's sentence to 10 years in prison for crossing his neighbor's backyard without permission.
Eighth Amendment
The 8th amendment is part of the first 10 amendments to the US constitution called the "Bill of Rights." It holds that ...
"Excessive bail shall not be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted."
Kevin could argue that 10 years in jail is cruel and unusual punishment for trespassing, a violation of the 8th amendment.