Question on a case play:

[Tru_in_Blu]

Another scenario we are discussing:

Not sure about the answer.

With no outs and the bases loaded, B4 hits a hard one-hopper back to F1 who immediately throws to F2 for a force play out on R1 from third base. F2 then attempts to retire B4 at first base but the throw hits B4 in the back while B4 was running inside the foul line. (Could be 20 feet from home or 40 feet from home. Does it matter?)

So we already have 1 out on the force at home. BR then interfered with a thrown ball trying to prevent a DP. So B4 is now out and we have a dead ball. Do we call the next closest runner to home (R2) out and have an inning-ending triple play?