From what time has the devil been a murderer?

Answer

"Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the
beginning, and abode not in the truth, because there is no truth in him." John 8: 44.

Through what was Christ made a complete and perfect Saviour?
In what other statement is this same truth expressed?
Can man of himself, unaided by Christ, keep the law?
What does He indicate as one of its purposes?
19. How will Christ's coming overtake those evil servants who say in their hearts, \"My Lord delays His coming\"?
What is the chief occupation of Satan and his angels?
What did David say with reference to his being afflicted?

Questions & Answers are from the book Bible Readings for the Home Circle