Any suggestions for a great crime thriller?

Looking for a nail-biting types thriller. 

 Ollie:

Tell Me What You Saw

The Game: Towards Zero

Kill It

thank you :))) will check these out

 Czakhareina:

Also:

• Signal
• Stranger / Secret Forest

thank you :))

 Peephole:

Cruel City is the best drama like ever!

Also there's Children of Nobody and  Bad Guys  

thank you :))

 aindi:

thank you :))

Thank you i had Signal in my list for last 1 month but i was not sure to really watch it.