Janssen-Collmann

How can I find a death certificate for Christine Janssen -Collmann. I think my family John Collmann and Cornelius Collmann left in 1888 from the Bremen port, possibly to Baltimore, Maryland, how can I verify this information. Thank -you Holly

Check this website and enter the name Kollmann, Hinrich - emigrated 1885 to Nebraska:

Regards,
Werner Honkomp