Understanding 'Criminal Abettor' - A Vague Concept in Legal Textbooks

Main text khatam ho gaya hai, lekin abhi tak clear picture nahin mili hai. Abettor ka kya hai, wohi kya nahin jise abetment kehte hain? Kyun nahin ye clear hain textbooks mein, tab hi confusion hai? BSNL ke 562 ka section khaali dhang se likha hai, lekin usse aisi situations nahin samajh aate jahan pehla abettor ke sath saath doosra bhi present hai. Aam kanoon mein kya hain, wo kuchh hai, lekin jo abettor ka concept hai woh kya hain? Real world example ya definition do dijiye na. Abettor aur abetment dono ko clear karke dekh lenge.