How long was velociraptor?

Estimating a dinosaur's life-span is guesswork. It depends on a lot of factors including whether they were warmblooded or cold-blooded (and this controversy has not been settled). Also, most dinosaurs, like other wild creatures, die long before their optimal age from attacks, disease, injuries, natural disasters, etc. I've never seen an estimate of Velociraptor's life-span.