Checking a battery with a mult-meter is not a proper test if that is the way you did it.
Measure the voltage across the battery when you hit the starter. It should only drop 2 volts or less.
Clean the positive and negative terminals. There may be hidden oxidation.
Check ground connection to the engine from the battery.
Check condition of main fuse holder. Look for burnt, loose, or corroded connections.
Call back and let us know what happened.