public OnPlayerWeaponShot(playerid, weaponid, hittype, hitid, Float:fX, Float:fY, Float:fZ)
{
    new Float:X, Float:Y, Float:Z;
    for(new i; i<MAX_PLAYERS; i++) // Loop through all the players
    {
        if(IsACop(i)) // Search for players that are cops
        {
            GetPlayerPos(i, X, Y, Z); // Get the cop's position.        
        }
    }
    if(IsPlayerInRangeOfPoint(playerid, 7.0, X, Y, Z)) // Check to see if the player who shot the weapon is near a cop
    {
        // Do something
        
    }
}

public OnPlayerWeaponShot(playerid, weaponid, hittype, hitid, Float:fX, Float:fY, Float:fZ)
{
    new Float:pX, Float:pY, Float:pZ;
    GetPlayerPos(playerid, pX, pY, pZ);
    for(new i; i < MAX_PLAYERS; i++)
    {
        if(IsCop(i))
        {
            if(IsPlayerInRangeOfPoint(i, /*Your Range*/, pX, pY, pZ))
            {
                SetPlayerWantedLevel(playerid, GetPlayerWantedLevel(playerid) + 2);
            }
        }
    }
    return 1;
}