"... The twin-engine Beechcraft with two people onboard ..."
"... Rashkov said the plane was 60 years old ...."
If Beech made a 2-seat, twin-engined airplane more than 60 years ago, it was a stealth plane, because no one ever has seen it.
Beechcraft Model 18 (or “Twin Beech”, as it is also known) is a 6- to 11-seat, twin-engined, low-wing, tailwheel light aircraft manufactured by the Beech Aircraft Corporation of Wichita, Kansas. Continuously produced from 1937 to November 1969 (over 32 years, a world record at the time), over 9,000 were built, making it one of the world's most widely used light aircraft. Sold worldwide as a civilian executive, utility, cargo aircraft, and passenger airliner on tailwheels, nosewheels, skis, or floats, it was also used as a military aircraft.
Note photo at link. Not exactly what most people think of as a Twin Engine Beechraft. This is probably drug smugglers in action.