Police say 23-year-old Joaquin Mendez died after asking a question to his cousin.
That question was about a bulletproof vest.
Mendez apparently asked his cousin, 24-year-old Alexandro Garibaldi, if the vest still worked
Garibaldi said "let's see" and pulled out a gun and shot Mendez, killing him.
Another person was inside the home at 2407 E Gordon Street in Tampa and saw the whole thing.
Garibaldi was arrested and charged with manslaughter and being a felon with a firearm.
The family of Mendez said they deeply hurt and didn't want to speak on camera.
They said Joaquin was a great, loving young man and they're thankful for all the prayers and support.