We discuss the nucleation and evolution of black holes in core-collapse of massive stars in binaries. With low probability, the newly formed black hole remains centered and matures into a high-mass rotating black hole, if the binary is compact. Type Ib/c supernovae are associated with the parent population of decentered events, wherein the black hole leaves the core prematurely. All decentered events should produce a single short burst in gravitational radiation. Centered events are predicted to produce a second, long burst in gravitational radiation powered by a luminous black hole, representing a triplet GRB-SN-GWB. These signatures are of interest to the gravitational-wave experiments LIGO, VIRGO and TAMA, and provide a method for calorimetric evidence for Kerr black holes.