Unanswered questions surrounding the death of legendary Texas A&M professor, F. Albert Cotton, has sparked an investigation.
Brazos County Sheriff Chris Kirk confirmed Monday, his office is investigating the death of Cotton who died in February.
Kirk said Cotton was hospitalized in October after his family thought he suffered a heart attack.
That's when doctors noticed suspicious injuries.
Kirk says they are investigating the origin of those injuries.
Cotton was director of the university's Laboratory for Molecular Structure and Bonding.
The university says Cotton's books sold more than 500,000 copies and were translated into 40 foreign languages.
The professor earned his doctorate from Harvard and taught at MIT before joining the Texas A&M faculty in 1972.
Among many honors in his life, Cotton won the international Wolf Prize in 2000 for his work in metallic elements.
Defense Secretary and former Texas A&M President Robert Gates called Cotton a "legendary figure at Texas A&M."