James A. Jenkins v. General Accident Fire

The defendant in an action for personal injuries sustained by one riding in the defendant's automobile was permitted by G.
L. c. 231, § 4B, to implead the insurer under the defendant's policy of motor vehicle liability insurance covering
the automobile. [701] Provisions of a policy of motor vehicle liability insurance, that no action should lie against the insurer unless the amount
of the insured's liability had been "finally determined," and that the insurer should not be "impleaded by the insured," could
not operate to defeat the statutory right of the insured to implead the insurer under G. L. c. 231, § 4B. [701-702]