Do cops normally do this?

[Archae]

I've had two visits now from our local sheriff's deputies, a drug store a block from my place was robbed on Sunday.

http://www.sheboyganpress.com/story/news/local/2014/08/25/police-seek-man-robbed-glander-drug-store/14576949/

They were polite, and asked serious questions that made sense.

But, is this normal?

[Historic NY]

1. Its called a canvass.

[Sienna86]

2. Same deputies or different?

Two visits may mean their wires were crossed over what houses were already visited.