Hi there
Sounds like Brookside to me. In the 80's there was a siege in the close, 2 died in that. Max Farnham's wife was possibly murdered and there were a couple of other unnatural deaths. I'm sure one of them would have been murder. In the 90s there was Trevor Jordache and Barry Grant. In the 2000s there was a drug dealer who murdered someone in the close so they all ganged up and murdered him. In short there have been more unnatural deaths in Brookside (over 30) than in any other soap shown on UK tv.
Hope this helps.