We don't actually know what happened in this case and why the lawsuit was not brought until around 3 years after the incident.
However, it is not so unusual. Whoever previously mentioned that this is unusual or typically indicative of a weak case, I strongly disagree.
Typically, a victim and his/her attorney will be dealing with the insurance carrier or the attorney for the shop that sold the defective product or committed the negligence, all before the lawsuit is filed with the court.
Typically, the lawsuit is filed with the court when the parties reach an impasse and are unable to resolve the claim on their own outside of court. This impasse can occur for many different reasons.
It is common that when the public first hears of the legal claim by the filing of a lawsuit in court, the legal claim has already been ongoing for quite some time.
I don't know if that's the situation in this instance, but it's certainly normal.
Also, in Connecticut, the statute of limitations for negligence is 2 years and the statute of limitations for a product liability claim is 3 years.
Michael