Exactly as I was trying to say GoodMan. The Black Panthers were gone by the mid 70s even if unofficially they weren't disbanded till 1982. There were a lot of good people in the early carnations and they did a lot of good in promoting black pride and with breakfast clubs etc. The reasons for drugs and gangs in all communities and especially the black ones are complicated and stem mainly from poverty and desperation which the Black Panthers were attempting, perhaps naively, to end. They were an interesting phenomenon and the real issue is why were the authorities so keen to destroy them? COINTELPRO and the allegation (backed up with some evidence) that the CIA/authorities helped flood the ghetto with drugs to stop them organising. How much truth is in that we will probably never know though they did find it to be partly true (blaming rogue agents).
Also the above article was actually about the British Black Panthers who were a completely different organisation if you read the article.
I live in the UK and went to the exhibition which was marvellous.