Read the following paragraph and determine if the hypothesis is true:

Ohannes Tuncboyacyan (a.k.a. Onno Tunc; Armenian: ; December 20, 1948 - January 14, 1996) was a leading Armenian-Turkish musician, working mainly as a composer and an arranger. Tunc also played bass guitar and occasionally double bass, contributing to the albums of several musicians. He was the elder brother of musician Arto Tuncboyacyan.

Hypothesis: Ohannes Tuncboyacyan had a strained relationship with his brother.
It's impossible to say