There was a time when there were lots of cases with 4 suspects, I guess you can say Gosho is somehow going back to the basics with this case : 4 suspects, a client, some blood...This case just feels like the good old ones to me.
Kogoro's A-le-le: http://www.youtube.com/watch?v=3iOdIemN3a8
Ep 514 a-le-le clip: http://www.youtube.com/watch?v=ZwO_kXDZia4 (Better sound for last part http://www.youtube.com/watch?v=Cn0u8ipf1LA)
A-le-le backfires: http://www.youtube.com/watch?v=8Jj-qs5Xx08
Oi-Oi compilation: http://www.youtube.com/watch?v=leFDG7f363U
Oi-Oi, A-le-le (including Haibara) and other things: http://www.youtube.com/watch?v=iNXeKR6BjoM