His parents learned of that selfless act upon the 22-year-old Keller High School graduate's accidental death this month.
"He was always thinking of others," said his mother, Janis Heidemann. "That's just the kind of person he was."
Even so, she realized what a tremendous gift her son had bestowed upon people he'll never meet.
"When you're young, you think you'll live forever," she said. "That makes it even more amazing that he made a conscious decision to be a donor."
Through his gift to Donate Life Texas Registry, doctors at JPS Health Network recovered several of Heidemann's organs, including his heart, kidneys, liver, lungs and pancreas. They also recovered his corneas.
"He had a big heart, and we're glad he donated it," his mother said. "Now someone else has a big heart for their family."
And, most rare, they recovered his entire right hand.
Read more: http://www.star-telegram.com/2012/02/26/3764506/organ-donation.html