Mexico's attorney general says he can prove what happened to 43 students who disappeared in the southern state of Guerrero in September.
Jesus Murillo Karam said his team had interviewed 99 people including members of the criminal gang whom he alleges murdered the students.
Correspondents say it is the first time he has declared all the students dead.Parents reacted angrily, saying that without proof, they would continue to believe their children were alive.
Mr Murillo Karam insisted that the students were killed by the gang and their bodies burnt at a rubbish dump - an explanation which relatives of the disappeared have rejected.
Structure of the Lead：
WHO-43students
WHEN-September
WHAT-disappeared
WHY-not given
WHERE-southern state of Guerrero
HOW-not given
Keywords：
1. disappear:消失
2. interview:會見
3. criminal:犯罪的
4. gang:幫派
5. murder:謀殺
6. declare:宣布
7. proof:證據
8. body:屍體
