CMD:arrest(playerid,params[])
{
    new time;
    SetTimerEx("UnjailTimer",time*1000,"i",playerid);//Note use time*1000 only if you're using per seconds if you want only 200 seconds use 200000 instead of time*1000
    return 1;
}

//Later usage
forward UnjailTime(playerid);
public UnjailTime(playerid)
{
    //Unjail him by using SpawnPlayer(playerid);, however you can either  set his postion
}

CMD:arrest(playerid,params[])
{
  new targetid, str[512];
  if(IsPlayerPolice[playerid] < 1) return SendClientMessage(playerid,-1,"{ff0000}This command only for cops");
  if(sscanf(params, "u", targetid)) return SendClientMessage(playerid, -1,"USAGE: /arrest [Part of Name/Player ID]");
  if(!IsPlayerConnected(targetid)) return SendClientMessage(playerid, 0xFFFFFFF,"ERROR: This player is not connected!");
  if(playerid == 0) return SendClientMessage(playerid, 0xFFFFFFF, "ERROR: You can't arrest yo self lmao");
  new target[MAX_PLAYER_NAME];
  GetPlayerName(targetid, target, sizeof(target));
  format(str, sizeof(str), "{ff0000}You have arrested %s",target);
  SendClientMessage(playerid, 0xE01B1B, str);
  GameTextForPlayer(playerid, "ARRESTED",5000,2);
  SendClientMessageToAll(-1, "%s Has been sent to jail");
  SetPlayerInterior(playerid, 6);
  ResetPlayerWeapons(playerid);
  SetTimerEx("UnjailTimer",1000,0,"i",targetid);
  return 1;
}

new targetid, str[512];