In light of recent mass shootings, should we Ban Murder?

Several high profile mass shootings have occurred recently. In light of this, should the USA outlaw murder? It's clear this has to stop. I propose we do this by banning murder and putting a strict penalty on it. The Left already believes that if we ban firearms, criminals will refuse to break the law and acquire them or use them illegally.

So if we ban murder and put a harsh penalty on it, shouldn't that really cut down on these killings? Since criminals follow the law and won't commit felonies for fear of going to jail? We already made it a felony for criminals to own firearms and that clearly works very well.
In light of recent mass shootings, should we Ban Murder?
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