The killers were assumed to be rival Egyptians.
( ( The killers ) ( ( were ( assumed ( to ( be ( rival Egyptians ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS killers)) (VP (VBD were) (VP (VBN assumed) (S (VP (TO to) (VP (VB be) (NP (JJ rival) (NNS Egyptians))))))) (. .)))
The thought of rival Egyptians committing the killings never occurred to anyone.
( ( ( The thought ) ( of ( ( rival Egyptians ) ( committing ( the killings ) ) ) ) ) ( never ( ( occurred ( to anyone ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN thought)) (PP (IN of) (NP (NP (JJ rival) (NNS Egyptians)) (VP (VBG committing) (NP (DT the) (NNS killings)))))) (ADVP (RB never)) (VP (VBD occurred) (PP (TO to) (NP (NN anyone)))) (. .)))