can someone mess with your car at night in order for it not to start?
does it have an alarm system on it? how old is it? why do you suspect foul play? Who have you pxxxxd off lately?
Usually a dead battery, or a nut falling off the starter lead, or something other mechanical is the cause of a non-start.
i do suspect of someone. he would always say he would do something to my car. So i dont doubt it!.. its a 98 ford taurus and i dosnt hava an alarm… we finally got it to start but as soon ans we turn it off i goes dead agin and the gas levels go up and down… he would alwas tell me that one day he was going to put water and sugar in mu gas tank do u think thats the reason???