Here are a few concise, engaging rewrites of the headline that preserve the original meaning:

– Police Investigate Armed Robbery at New Haven Vape Shop on Whalley Avenue
– Armed Robbery Reported at Whalley Avenue Vape Shop in New Haven, Police Say
– New Haven Authorities Probe Armed Robbery at Whalley Avenue Vape Shop

If you’d like the full article rewritten, please paste the text and I’ll revise it to be more engaging while keeping the facts unchanged.