((*Will mark brainiest to the first right answer for my question AND my riddle uwu*)) At which age do health officials recommend vaccinations begin?
1 year old
birth
1 month old
18 years old

*Riddle Time!*

An old man lived alone in a small cottage. One certain Thursday morning, while the mailman was delivering a letter he found out that the old man is murdered. He immediately calls the cops.

When the cops arrive at the scene. They find two bottles of milk, Monday’s newspaper, a catalog, flyers, and unopened mail. The police find the suspect. Who is the suspect and why?