Having seen many a times response and the way Delhi police officers, constables behave on phone, at work places and at variety of situations, confidently I can say that DP is one of the finest police forces in our country.
Recent examples of catching wrongdoers in ministry of IB, ministry of defence, airforce personnels supporting Pakistani agencies by Sharing documents of national importance. Credibility of DP isn't questionable at all. Dp deals with foreign nationals, students at universities, Political leaders it has way more experience of being a metropolitan police force than any other police departments in various states.
Response of Delhi police creates calmness in public and terror in bad elements.
One last line ' Sadev apki seva me tatpar' means ' ready to help and assist you for always'.
------- Edited on 2017-08-26 -------
I'm to write what I have experienced during my stay in Delhi for almost 6years now, not on one but on many occasions I found Delhi police effective and sincere with regard to queries that I have raised with control room. Once I received a fake bank call seeking my account info. not only police department call me back but they sent 5-6 police officers to assist me through. I have reported fire tragedies, home quarrels and bad behaviour of sellers on footpath and on all chapters Delhi police has been really appreciable .
During a fight with my PG owner whole south Delhi police took cognizance and sent their mobile units.
Throughout my time here I have never seen complacent behaviour of any well informed police officers. Delhi police is one of the largest metropolitan police forces in world. they deal with students, law makers, foreigners, variety of people they deal with, having such a vast pool of information they are really good compare to any police force of our cpuntry. Ofcourse Maharashtra police is also a better one. Delhi police arrested Army officers who sniffed info to Pakistan, busted a well working gang of airforce officer, solved so many big cases . I have full faith in Delhi police and yes it doesn't mean they don't need training yes they do. They have to be more better like USA law inforcement officers. Best wishes for this big vast dept. Jai hind