background
black
burglar
color
concept
crime
criminal
curiosity
danger
detective
door
eye
eyeball
fence
hiding
hole
human
icon
illustration
investigate
investigation
isolated
key
keyhole
line
lock
look
looking
mystery
one
outline
peeking
peep
peephole
people
person
privacy
safety
secrecy
security
spy
spying
stroke
surveillance
symbol
thin
view
watching