It appears that BP Amoco’s widely acclaimed but risky efforts to find out why employees have been stricken with deadly brain cancer since 1986 is coming back to haunt the company.

BP Amoco began its investigation before any employees brought suit against the company, but now some workers who have contracted benign brain tumors or extra–cranial cancers have become so angry with how the company has handled the matter–including Amoco’s failure to share all the evidence it has uncovered with sick employees-that they have taken matters into their own hands. Since last summer, one current and 19 former employees who contracted cancer or tumors after working at the Amoco Research Center here, or the former employees’ survivors, have sued BP Amoco in circuit court in Chicago. BP Amoco, the London-based oil giant that was created after British Petroleum acquired Chicago-based Amoco, is expected to be the target of more suits in the near future.