Using data from the FOCUS experiment we analyze the D + π − and D 0 π + invariant mass distributions. We measure the D * 0 2 mass M D * 0 2 = (2464.5 ± 1.1 ± 1.9) MeV/c 2 and width Γ D * 0 2

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Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present evidence for a small, even spinAlthough this interference significantly distorts the D + → K − π + µ + ν decay angular distributions, the new amplitude creates only a very small distortion to the observed kaon pion mass distribution when integrated over the other kinematic variables describing the decay. Our data can be described by K * 0 interference with either a constant amplitude or broad spin zero resonance.