A systematic study was made on 731 K stars in a stock of emulsion plates' exposed to 500 Mev/c negative K mesons from the Bevatron at the Lawrence Radiation Laboratory, U.S.A. In 102 cases Σ hyperons were found to be emitted and 42 of which were found to decay. There were 11 protonic and 13 pionic decays at rest, 5 protonic and 12 pionic decays in flight and one unique case of photonic decay event. This , with the authors previous work, leads to the probability 2/125=(1.6±0.19)% of photonic decay mode. From the up-down asymmetry in the distribution of the decay pion, the values of the non-conserving parameters 's are found to beαo P= -0.25±0.65α P = 0.15±0.73 and α P =-0.17±0.76 where superscripts refer to the charges of the decay pion and P, the average polarisation of Σ hyperon. For the forward-back-ward distribution, 25 events have been found to be in the backward hemisphere out of a total of 41 events. This, with the authors previous work, 46 events were found to be in the backward hemisphere out of a tally of 81 events, which shows a substantial asymmetry in the forward backward distributions, thus favouring the hypothesis of the parity doublet states of ∑ hyperon. The angular distribution curve of decay pion shows its fair fitting with the theoretical isotropic as well as (1+3Cos2Q) distribution. This supports the idea that the spin of Σ hyperon might be in between ½ and 3/2 i.e., it might have intergal spin. (For previous work referred to in this abstract see Hussain et al. Proceedings of the 1964 Peking, Symposium Gen: 147, pp. 1-11).