if(WantedPoints[giveplayerid] == 0) { WantedPoints[giveplayerid] = 1; }
                            else { WantedPoints[giveplayerid]+= 1; }
                            SetPlayerWantedLevel(playerid, +=1); <===== This should give the star, But i get errors
                            SetPlayerCriminal(giveplayerid,playerid, result);
                            PlayCrimeReportForPlayer(playerid, giveplayerid, 15);

SetPlayerWantedLevel(giveplayerid, GetPlayerWantedLevel(giveplayerid) + 1);

WantedPoints[giveplayerid]+= 1; //It doesn't matter if WantedPoints is 0 or not. +1 will do the same as setting it from 0 to 1, then from 1 to 2, etc
SetPlayerWantedLevel(playerid, WantedPoints[giveplayerid]); //You have a variable, might as well use it
SetPlayerCriminal(giveplayerid,playerid, result);
PlayCrimeReportForPlayer(playerid, giveplayerid, 15);