[ZASTRELIS]

public Action OnPlayerDeath_Pre(Event event, const char[] name, bool dontBroadcast)
{
    int attacker = GetClientOfUserId( GetEventInt( event, "attacker" ) );
    
    int userid = GetClientOfUserId( GetEventInt( event, "userid" ) );
    
    if ( ( 1 <= attacker <= MaxClients ) && ( 1 <= userid <= MaxClients ) )
    {
        char g_szWeapon[ 32 ];
        
        GetEventString( event, "weapon", g_szWeapon, sizeof( g_szWeapon ) );

        if ( StrEqual( g_szWeapon, "env_beam" ) )
        {
            SetEventString( event, "weapon", s_wpn_dmg );
            
            if (b_lm_hs)
            {
                SetEventBool(event, "headshot", true);
            }
        }
    }
    
    return Plugin_Continue;
}

Problem with pre method and env_beam, HS not works now!