From their study:
Of the 125 incidents in which police killed an unarmed civilian, 25% (31) began on traffic stops, and 65% (81) began as a response to a 911-call about a violent crime (robber, E.g.,[i], carjacking[ii], domestic violence[iii] or assault[iv]) or property crime (burglary[v], car theft[vi] or vandalism[vii]) in progress.
In addition to those, there were nine people (7%) whom 911 callers described as being, “crazy[viii],” or, “on drugs[ix]”, “covered with blood[x]”, and “yelling[xi]”, or threatening people[xii]. Three (2%) were wanted[xiii] fugitives[xiv] in the act of escape[xv] — and one was unarmed when he died but was acting as part of a gang of three who were wanted in a recent homicide and were at the time of the incident in the progress of a kidnapping a woman[xvi].
In all, there were 26 incidents that involved an assault by the unarmed civilian against another civilian before police arrived, and in two cases, the murder of other civilians by the decedent.