metries. In our previous work [15], we have shown that the fundamental symmetries of quantum field theory such as parity ( P ) and charge-conjugation ( C ) can be used to stabilize the DM particle. We have explicitly demonstrated that in a left-right (LR) symmetry model with P and CP only broken spontaneously, a gauge singlet scalar with odd CP parity can be automatically stable without imposing any extra discrete symmetries. Motivated by the recent experimental results, we consider in this work the possibility of DM particle decay by adding soft C − violating interactions into our previous model, which will result in the decay of DM particle with SU (2)$_{L}$ triplet scalars as intermediate states. The decays of the triplets into the SM gauge boson pairs W $^{±}$W $^{±}$, W $^{±}$Z $^{0}$, Z $^{0}$Z0 as well as the SM-like Higgs bosons h $^{0}$h0 are all suppressed by the smallness of the vacuum expectation value (VEV) of the left-handed triplet as required by the tiny neutrino masses. Thus the triplets decaying into quarks indirectly through these states are strongly suppressed. If the reported positron excess indeed originates from DM particle decay through the in- termediate SU (2)$_{L}$ triplets, the possible associating signals such as the high energy neutrinos and gamma-rays are expected. This is because the neutral and singly charged components of the triplets couple to neutrinos in the same way as the doubly charged components couple to charged leptons. The final state leptons may generate high energy gamma-rays through inverse Compton scatterings (ICS) and final state radiations (FSR), which is common to many DM models. In this model the doubly and singly charged components of the triplet can also produce extra gamma-rays through virtual internal bremsstrahlung (VIB), which gives additional contributions to the gamma-ray spectrum at very high energy region. In this work we first show how the DM particle decay caused by the soft C -violating interactions can naturally explain the observed excess of the positron and electron excesses, and then focus on the cosmic-ray signals associated with DM particle decay through in- termediate SU (2)$_{L}$ triplets in a LR symmetric model with two Higgs bidoublets [15, 16]. After exploring the typical parameters which can explain the current PAMELA as well as Fermi-LAT or ATIC data, we present predictions for the flux of neutrinos and gamma-rays. We find that the predicted neutrino-induced muon flux can be significantly larger than the case in which DM particle only directly decays into charged leptons. The energy spectrum of diffuse gamma-rays can be enhanced by the VIB processes from internal charged triplets as well. Although the analysis is done in a particular model, the conclusions are generally valid for other models which involve SU (2)$_{L}$ triplets as intermediate states, such as the DM 3